diff --git a/scripts/deployqtHelper_mac.sh b/scripts/deployqtHelper_mac.sh
index 867fa5c6988..97cefee46bf 100755
--- a/scripts/deployqtHelper_mac.sh
+++ b/scripts/deployqtHelper_mac.sh
@@ -67,6 +67,18 @@ if [ -d "$assetimporterSrcDir" ]; then
     fi
 fi
 
+# workaround for Qt 6.2:
+# - QTBUG-94796 macdeployqt does not deploy /Contents/PlugIns/sqldrivers/libqsqlite.dylib anymore
+sqldriversDestDir="$app_path/Contents/PlugIns/sqldrivers"
+sqldriversSrcDir="$plugin_src/sqldrivers"
+if [ -d "$sqldriversSrcDir" ]; then
+    if [ ! -d "$sqldriversDestDir" ]; then
+        echo "- Copying sqlitedriver plugin"
+        mkdir -p "$sqldriversDestDir"
+        cp "$sqldriversSrcDir/libqsqlite.dylib" "$sqldriversDestDir/libqsqlite.dylib"
+    fi
+fi
+
 # copy Qt Quick 2 imports
 imports2Dir="$app_path/Contents/Imports/qtquick2"
 if [ -d "$quick2_src" ]; then
diff --git a/src/libs/tracing/CMakeLists.txt b/src/libs/tracing/CMakeLists.txt
index cb46eb21b03..e44c9dc57b3 100644
--- a/src/libs/tracing/CMakeLists.txt
+++ b/src/libs/tracing/CMakeLists.txt
@@ -32,17 +32,13 @@ set(TRACING_CPP_SOURCES
   tracing_global.h
 )
 
-add_qtc_library(Tracing
-  FEATURE_INFO
-  DEPENDS Utils Qt5::Qml Qt5::Quick
-  PUBLIC_DEPENDS Qt5::Widgets
-  SOURCES
-    ${TEST_SOURCES}
-)
-
 if(${Qt5_VERSION} VERSION_LESS "6.2.0")
-  extend_qtc_library(Tracing
+  add_qtc_library(Tracing
+    FEATURE_INFO
+    DEPENDS Utils Qt5::Qml Qt5::Quick
+    PUBLIC_DEPENDS Qt5::Widgets
     SOURCES
+      ${TEST_SOURCES}
       ${TRACING_CPP_SOURCES}
       qml/tracing.qrc
   )
@@ -51,6 +47,14 @@ else() # < Qt 6.2
     return()
   endif()
 
+  add_qtc_library(Tracing
+    FEATURE_INFO
+    DEPENDS Utils Qt5::Qml Qt5::Quick
+    PUBLIC_DEPENDS Qt5::Widgets
+    SOURCES
+      ${TEST_SOURCES}
+  )
+
   set(TRACING_QML_FILES
     qml/ButtonsBar.qml
     qml/CategoryLabel.qml
diff --git a/src/libs/tracing/qml/CategoryLabel.qml b/src/libs/tracing/qml/CategoryLabel.qml
index cfd98c9a31f..e70dba108c8 100644
--- a/src/libs/tracing/qml/CategoryLabel.qml
+++ b/src/libs/tracing/qml/CategoryLabel.qml
@@ -72,7 +72,7 @@ Item {
     DropArea {
         id: dropArea
 
-        onPositionChanged: {
+        onPositionChanged: (drag) => {
             var sourceIndex = drag.source.visualIndex;
             if (drag.source.y === 0) {
                 // special case for first position: Always swap, no matter if upper border touched.
@@ -129,7 +129,7 @@ Item {
                             labelContainer.selectNextBySelectionId(label.id);
                         }
                     }
-                    onSetRowHeight: {
+                    onSetRowHeight: (newHeight) => {
                         labelsArea.parentModel.setExpandedRowHeight(index + 1, newHeight);
                         loader.height = labelsArea.parentModel.rowHeight(index + 1);
                     }
diff --git a/src/libs/tracing/qml/MainView.qml b/src/libs/tracing/qml/MainView.qml
index 0bdf9346ec7..17a6a29e3c0 100644
--- a/src/libs/tracing/qml/MainView.qml
+++ b/src/libs/tracing/qml/MainView.qml
@@ -151,8 +151,12 @@ Rectangle {
         zoomer: zoomControl
         reverseSelect: shiftPressed
 
-        onMoveCategories: content.moveCategories(sourceIndex, targetIndex)
-        onSelectItem: content.select(modelIndex, eventIndex)
+        onMoveCategories: (sourceIndex, targetIndex) => {
+            content.moveCategories(sourceIndex, targetIndex)
+        }
+        onSelectItem: (modelIndex, eventIndex) => {
+            content.select(modelIndex, eventIndex)
+        }
     }
 
     TimeDisplay {
@@ -206,7 +210,7 @@ Rectangle {
 
         onWidthChanged: selectionRange.update();
 
-        onPropagateSelection: {
+        onPropagateSelection: (newModel, newItem) => {
             if (lockItemSelection || (newModel === selectedModel && newItem === selectedItem))
                 return;
 
diff --git a/src/libs/tracing/qml/Overview.qml b/src/libs/tracing/qml/Overview.qml
index d2b3eb29417..5152e4bc965 100644
--- a/src/libs/tracing/qml/Overview.qml
+++ b/src/libs/tracing/qml/Overview.qml
@@ -168,10 +168,10 @@ Rectangle {
             }
         }
 
-        onPressed: {
+        onPressed: (mouse) => {
             jumpTo(mouse.x);
         }
-        onPositionChanged: {
+        onPositionChanged: (mouse) => {
             jumpTo(mouse.x);
         }
     }
diff --git a/src/libs/tracing/qml/TimelineLabels.qml b/src/libs/tracing/qml/TimelineLabels.qml
index c675ce1b6d9..88fadfa6342 100644
--- a/src/libs/tracing/qml/TimelineLabels.qml
+++ b/src/libs/tracing/qml/TimelineLabels.qml
@@ -115,14 +115,14 @@ Flickable {
                             categories.selectItem(index, eventId)
                         }
 
-                        onSelectNextBySelectionId: {
+                        onSelectNextBySelectionId: (selectionId) => {
                             categories.selectItem(index, modelData.nextItemBySelectionId(
                                     selectionId, zoomer.rangeStart,
                                     categories.selectedModel === index ? categories.selectedItem :
                                                                          -1));
                         }
 
-                        onSelectPrevBySelectionId: {
+                        onSelectPrevBySelectionId: (selectionId) => {
                             categories.selectItem(index,  modelData.prevItemBySelectionId(
                                     selectionId, zoomer.rangeStart,
                                     categories.selectedModel === index ? categories.selectedItem :
diff --git a/src/libs/tracing/qml/TimelineRulers.qml b/src/libs/tracing/qml/TimelineRulers.qml
index 0e052e716ff..99c9d533a37 100644
--- a/src/libs/tracing/qml/TimelineRulers.qml
+++ b/src/libs/tracing/qml/TimelineRulers.qml
@@ -44,7 +44,7 @@ Item {
         anchors.right: parent.right
         height: scaleHeight
 
-        onClicked: {
+        onClicked: (mouse) => {
             rulersModel.append({
                 timestamp: (mouse.x + contentX) * viewTimePerPixel + windowStart
             });
diff --git a/src/libs/utils/CMakeLists.txt b/src/libs/utils/CMakeLists.txt
index 41eed8d531f..9035f01b11d 100644
--- a/src/libs/utils/CMakeLists.txt
+++ b/src/libs/utils/CMakeLists.txt
@@ -71,6 +71,7 @@ add_qtc_library(Utils
     htmldocextractor.cpp htmldocextractor.h
     icon.cpp icon.h
     id.cpp id.h
+    indexedcontainerproxyconstiterator.h
     infobar.cpp infobar.h
     infolabel.cpp infolabel.h
     itemviews.cpp itemviews.h
diff --git a/src/libs/utils/fileutils.cpp b/src/libs/utils/fileutils.cpp
index 9f8c7f67d5a..22589c9ed34 100644
--- a/src/libs/utils/fileutils.cpp
+++ b/src/libs/utils/fileutils.cpp
@@ -390,7 +390,9 @@ FilePath FilePath::resolvePath(const QString &fileName) const
 {
     if (FileUtils::isAbsolutePath(fileName))
         return FilePath::fromString(QDir::cleanPath(fileName));
-    return FilePath::fromString(QDir::cleanPath(toString() + QLatin1Char('/') + fileName));
+    FilePath result = *this;
+    result.setPath(QDir::cleanPath(m_data + '/' + fileName));
+    return result;
 }
 
 FilePath FilePath::cleanPath() const
diff --git a/src/libs/utils/indexedcontainerproxyconstiterator.h b/src/libs/utils/indexedcontainerproxyconstiterator.h
new file mode 100644
index 00000000000..7e9dd4c82a6
--- /dev/null
+++ b/src/libs/utils/indexedcontainerproxyconstiterator.h
@@ -0,0 +1,188 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "utils_global.h"
+
+#include <QtGlobal>
+
+#include <type_traits>
+
+namespace Utils {
+
+/// A class useful for the implementation of the -> operator of proxy iterators.
+template <typename Reference>
+struct ArrowProxy {
+    Reference r;
+    Reference *operator->() {
+        return &r;
+    }
+};
+
+/// Random-access const iterator over elements of a container providing an overloaded operator[]
+/// (which may return a proxy object, like std::vector<bool>, rather than a reference).
+template <typename Container>
+class IndexedContainerProxyConstIterator
+{
+public:
+    typedef std::random_access_iterator_tag iterator_category;
+    typedef typename std::make_signed<typename Container::size_type>::type difference_type;
+    typedef typename Container::value_type value_type;
+    typedef value_type reference;
+    typedef ArrowProxy<reference> pointer;
+    typedef typename Container::size_type size_type;
+
+    IndexedContainerProxyConstIterator()
+      : m_container(nullptr), m_index(0)
+    {}
+
+    IndexedContainerProxyConstIterator(const Container &container, size_type index)
+      : m_container(&container), m_index(index)
+    {}
+
+    reference operator*() const
+    {
+        Q_ASSERT(m_container);
+        return (*m_container)[m_index];
+    }
+
+    pointer operator->() const
+    {
+        Q_ASSERT(m_container);
+        return pointer{(*m_container)[m_index]};
+    }
+
+    reference operator[](difference_type j) const
+    {
+        Q_ASSERT(m_container);
+        return (*m_container)[m_index + j];
+    }
+
+    bool operator==(const IndexedContainerProxyConstIterator &other) const
+    {
+        Q_ASSERT(m_container == other.m_container);
+        return m_index == other.m_index;
+    }
+
+    bool operator!=(const IndexedContainerProxyConstIterator &other) const
+    {
+        Q_ASSERT(m_container == other.m_container);
+        return m_index != other.m_index;
+    }
+
+    bool operator<(const IndexedContainerProxyConstIterator &other) const
+    {
+        Q_ASSERT(m_container == other.m_container);
+        return m_index < other.m_index;
+    }
+
+    bool operator<=(const IndexedContainerProxyConstIterator &other) const
+    {
+        Q_ASSERT(m_container == other.m_container);
+        return m_index <= other.m_index;
+    }
+
+    bool operator>(const IndexedContainerProxyConstIterator &other) const
+    {
+        Q_ASSERT(m_container == other.m_container);
+        return m_index > other.m_index;
+    }
+
+    bool operator>=(const IndexedContainerProxyConstIterator &other) const
+    {
+        Q_ASSERT(m_container == other.m_container);
+        return m_index >= other.m_index;
+    }
+
+    IndexedContainerProxyConstIterator &operator++()
+    {
+        ++m_index;
+        return *this;
+    }
+
+    IndexedContainerProxyConstIterator operator++(int)
+    {
+        IndexedContainerProxyConstIterator copy(*this);
+        ++m_index;
+        return copy;
+    }
+
+    IndexedContainerProxyConstIterator &operator--()
+    {
+        --m_index;
+        return *this;
+    }
+
+    IndexedContainerProxyConstIterator operator--(int)
+    {
+        IndexedContainerProxyConstIterator copy(*this);
+        --m_index;
+        return copy;
+    }
+
+    IndexedContainerProxyConstIterator &operator+=(difference_type j)
+    {
+        m_index += j;
+        return *this;
+    }
+
+    IndexedContainerProxyConstIterator &operator-=(difference_type j)
+    {
+        m_index -= j;
+        return *this;
+    }
+
+    IndexedContainerProxyConstIterator operator+(difference_type j) const
+    {
+        IndexedContainerProxyConstIterator result(*this);
+        result += j;
+        return result;
+    }
+
+    IndexedContainerProxyConstIterator operator-(difference_type j) const
+    {
+        IndexedContainerProxyConstIterator result(*this);
+        result -= j;
+        return result;
+    }
+
+    friend IndexedContainerProxyConstIterator operator+(
+            difference_type j, const IndexedContainerProxyConstIterator &other)
+    {
+        return other + j;
+    }
+
+    difference_type operator-(const IndexedContainerProxyConstIterator &other) const
+    {
+        return static_cast<difference_type>(m_index) - static_cast<difference_type>(other.m_index);
+    }
+
+private:
+    const Container *m_container;
+    size_type m_index;
+};
+
+} // namespace Utils
diff --git a/src/libs/utils/treemodel.h b/src/libs/utils/treemodel.h
index 53a6a3900ea..7240d8d6b6b 100644
--- a/src/libs/utils/treemodel.h
+++ b/src/libs/utils/treemodel.h
@@ -26,6 +26,7 @@
 #pragma once
 
 #include "utils_global.h"
+#include "indexedcontainerproxyconstiterator.h"
 
 #include <QAbstractItemModel>
 
@@ -119,6 +120,15 @@ public:
         });
     }
 
+    using value_type = ChildType *;
+    using const_iterator = IndexedContainerProxyConstIterator<TypedTreeItem>;
+    using size_type = int;
+
+    ChildType *operator[](int index) const { return childAt(index); }
+    int size() const { return childCount(); }
+    const_iterator begin() const { return const_iterator(*this, 0); }
+    const_iterator end() const { return const_iterator(*this, size()); }
+
     template <typename Predicate>
     void forAllChildren(const Predicate &pred) const {
         const auto pred0 = [pred](TreeItem *treeItem) { pred(static_cast<ChildType *>(treeItem)); };
diff --git a/src/libs/utils/utils-lib.pri b/src/libs/utils/utils-lib.pri
index a8b8ccd5852..d9a2633deaa 100644
--- a/src/libs/utils/utils-lib.pri
+++ b/src/libs/utils/utils-lib.pri
@@ -153,6 +153,7 @@ HEADERS += \
     $$PWD/environmentfwd.h \
     $$PWD/genericconstants.h \
     $$PWD/globalfilechangeblocker.h \
+    $$PWD/indexedcontainerproxyconstiterator.h \
     $$PWD/benchmarker.h \
     $$PWD/displayname.h \
     $$PWD/environment.h \
diff --git a/src/libs/utils/utils.qbs b/src/libs/utils/utils.qbs
index b2c6bfe57f8..fdc625c2412 100644
--- a/src/libs/utils/utils.qbs
+++ b/src/libs/utils/utils.qbs
@@ -149,6 +149,7 @@ Project {
             "icon.h",
             "id.cpp",
             "id.h",
+            "indexedcontainerproxyconstiterator.h",
             "infobar.cpp",
             "infobar.h",
             "infolabel.cpp",
diff --git a/src/plugins/coreplugin/menubarfilter.cpp b/src/plugins/coreplugin/menubarfilter.cpp
index 354a0e7b367..207959f2d74 100644
--- a/src/plugins/coreplugin/menubarfilter.cpp
+++ b/src/plugins/coreplugin/menubarfilter.cpp
@@ -101,7 +101,9 @@ QList<LocatorFilterEntry> MenuBarFilter::matchesForAction(QAction *action,
     QList<LocatorFilterEntry> entries;
     if (!m_enabledActions.contains(action))
         return entries;
-    const QString text = Utils::stripAccelerator(action->text());
+    const QString whatsThis = action->whatsThis();
+    const QString text = Utils::stripAccelerator(action->text())
+                         + (whatsThis.isEmpty() ? QString() : QString(" (" + whatsThis + ")"));
     if (QMenu *menu = action->menu()) {
         if (processedMenus.contains(menu))
             return entries;
diff --git a/src/plugins/debugger/debuggeritemmanager.cpp b/src/plugins/debugger/debuggeritemmanager.cpp
index fd0bfd91178..55d7833761c 100644
--- a/src/plugins/debugger/debuggeritemmanager.cpp
+++ b/src/plugins/debugger/debuggeritemmanager.cpp
@@ -432,8 +432,7 @@ void DebuggerItemConfigWidget::binaryPathHasChanged()
         return;
 
     DebuggerItem tmp;
-    QFileInfo fi = QFileInfo(m_binaryChooser->filePath().toString());
-    if (fi.isExecutable()) {
+    if (m_binaryChooser->filePath().isExecutableFile()) {
         tmp = item();
         tmp.reinitializeFromFile();
     }
@@ -800,7 +799,7 @@ void DebuggerItemManagerPrivate::autoDetectGdbOrLldbDebuggers(const FilePath &de
         const QString name = detectionSource.isEmpty() ? tr("System %1 at %2") : tr("Detected %1 at %2");
         item.setUnexpandedDisplayName(name.arg(item.engineTypeName()).arg(command.toUserOutput()));
         m_model->addDebugger(item);
-        logMessages.append(tr("Found: \"%1\"").arg(name));
+        logMessages.append(tr("Found: \"%1\"").arg(command.toUserOutput()));
     }
     if (logMessage)
         *logMessage = logMessages.join('\n');
diff --git a/src/plugins/docker/dockerdevice.cpp b/src/plugins/docker/dockerdevice.cpp
index b533c67d335..b355eb5d9b3 100644
--- a/src/plugins/docker/dockerdevice.cpp
+++ b/src/plugins/docker/dockerdevice.cpp
@@ -49,6 +49,7 @@
 #include <utils/basetreeview.h>
 #include <utils/environment.h>
 #include <utils/hostosinfo.h>
+#include <utils/utilsicons.h>
 #include <utils/layoutbuilder.h>
 #include <utils/overridecursor.h>
 #include <utils/port.h>
@@ -69,6 +70,7 @@
 #include <QLoggingCategory>
 #include <QPushButton>
 #include <QTextBrowser>
+#include <QToolButton>
 #include <QThread>
 
 #ifdef Q_OS_UNIX
@@ -312,6 +314,14 @@ public:
     QFileSystemWatcher m_mergedDirWatcher;
 
     Environment m_cachedEnviroment;
+
+    enum LocalAccessState
+    {
+        NotEvaluated,
+        NoDaemon,
+        Accessible,
+        NotAccessible
+    } m_accessible = NotEvaluated;
 };
 
 class DockerDeviceWidget final : public IDeviceWidget
@@ -337,6 +347,17 @@ public:
         m_repoLineEdit->setText(data.repo);
         m_repoLineEdit->setEnabled(false);
 
+        auto daemonStateLabel = new QLabel(tr("Daemon state:"));
+        m_daemonReset = new QToolButton;
+        m_daemonReset->setIcon(Icons::INFO.icon());
+        m_daemonReset->setToolTip(tr("Daemon state not evaluated."));
+
+        connect(m_daemonReset, &QToolButton::clicked, this, [this, dockerDevice] {
+            dockerDevice->resetDaemonState();
+            m_daemonReset->setIcon(Icons::INFO.icon());
+            m_daemonReset->setToolTip(tr("Daemon state not evaluated."));
+        });
+
         m_runAsOutsideUser = new QCheckBox(tr("Run as outside user"));
         m_runAsOutsideUser->setToolTip(tr("Use user ID and group ID of the user running Qt Creator "
                                           "in the Docker container."));
@@ -369,6 +390,16 @@ public:
             logView->clear();
             dockerDevice->tryCreateLocalFileAccess();
             m_kitItemDetector.autoDetect(id);
+
+            if (!dockerDevice->isDaemonRunning()) {
+                logView->append(tr("Docker daemon appears to be not running."));
+                m_daemonReset->setToolTip(tr("Daemon not running. Push to reset the state."));
+                m_daemonReset->setIcon(Icons::CRITICAL.icon());
+            } else {
+                m_daemonReset->setToolTip(tr("Docker daemon running."));
+                m_daemonReset->setIcon(Icons::OK.icon());
+
+            }
         });
 
         connect(undoAutoDetectButton, &QPushButton::clicked, this, [this, logView, id = data.id()] {
@@ -381,6 +412,7 @@ public:
         Form {
             idLabel, m_idLineEdit, Break(),
             repoLabel, m_repoLineEdit, Break(),
+            daemonStateLabel, m_daemonReset, Break(),
             m_runAsOutsideUser, Break(),
             tr("Paths to mount:"), m_pathsLineEdit, Break(),
             Column {
@@ -397,6 +429,7 @@ public:
 private:
     QLineEdit *m_idLineEdit;
     QLineEdit *m_repoLineEdit;
+    QToolButton *m_daemonReset;
     QCheckBox *m_runAsOutsideUser;
     QLineEdit *m_pathsLineEdit;
 
@@ -648,7 +681,7 @@ void DockerDevice::tryCreateLocalFileAccess() const
 
 void DockerDevicePrivate::stopCurrentContainer()
 {
-    if (m_container.isEmpty())
+    if (m_container.isEmpty() || m_accessible == NoDaemon)
         return;
 
     QtcProcess proc;
@@ -662,7 +695,7 @@ void DockerDevicePrivate::stopCurrentContainer()
 
 void DockerDevicePrivate::tryCreateLocalFileAccess()
 {
-    if (!m_container.isEmpty())
+    if (!m_container.isEmpty() || m_accessible == NoDaemon)
         return;
 
     QString tempFileName;
@@ -701,6 +734,14 @@ void DockerDevicePrivate::tryCreateLocalFileAccess()
             LOG("RES: " << m_shell->result()
                 << " STDOUT: " << m_shell->readAllStandardOutput()
                 << " STDERR: " << m_shell->readAllStandardError());
+            if (m_shell->exitCode() != 0) {
+                m_accessible = NoDaemon;
+                LOG("DOCKER DAEMON NOT RUNNING?");
+                MessageManager::writeFlashing(tr("Docker Daemon appears to be not running. "
+                                                 "Verify daemon is up and running and reset the "
+                                                 "docker daemon on the docker device settings page "
+                                                 "or restart Qt Creator."));
+            }
         }
         m_container.clear();
     });
@@ -723,10 +764,11 @@ void DockerDevicePrivate::tryCreateLocalFileAccess()
                 break;
             }
         }
-        if (i == 20) {
+        if (i == 20 || m_accessible == NoDaemon) {
             qWarning("Docker cid file empty.");
             return; // No
         }
+        qApp->processEvents(); // FIXME turn this for-loop into QEventLoop
         QThread::msleep(100);
     }
 
@@ -753,11 +795,13 @@ void DockerDevicePrivate::tryCreateLocalFileAccess()
             // of using wsl or a named pipe.
             // TODO investigate how to make it possible nevertheless.
             m_mergedDir.clear();
+            m_accessible = NotAccessible;
             MessageManager::writeSilently(tr("This is expected on Windows."));
             return;
         }
     }
 
+    m_accessible = Accessible;
     m_mergedDirWatcher.addPath(m_mergedDir);
 }
 
@@ -766,6 +810,24 @@ bool DockerDevice::hasLocalFileAccess() const
     return !d->m_mergedDir.isEmpty();
 }
 
+bool DockerDevice::isDaemonRunning() const
+{
+    switch (d->m_accessible) {
+    case DockerDevicePrivate::NoDaemon:
+        return false;
+    case DockerDevicePrivate::NotEvaluated: // FIXME?
+    case DockerDevicePrivate::Accessible:
+    case DockerDevicePrivate::NotAccessible:
+        return true;
+    }
+    return false;
+}
+
+void DockerDevice::resetDaemonState()
+{
+    d->m_accessible = DockerDevicePrivate::NotEvaluated;
+}
+
 void DockerDevice::setMounts(const QStringList &mounts) const
 {
     d->m_data.mounts = mounts;
@@ -1183,7 +1245,7 @@ bool DockerDevice::writeFileContents(const Utils::FilePath &filePath, const QByt
 void DockerDevice::runProcess(QtcProcess &process) const
 {
     tryCreateLocalFileAccess();
-    if (d->m_container.isEmpty()) {
+    if (d->m_container.isEmpty() || d->m_accessible == DockerDevicePrivate::NoDaemon) {
         LOG("No container set to run " << process.commandLine().toUserOutput());
         QTC_CHECK(false);
         process.setResult(QtcProcess::StartFailed);
@@ -1237,6 +1299,8 @@ void DockerDevicePrivate::fetchSystemEnviroment()
 
 int DockerDevicePrivate::runSynchronously(const CommandLine &cmd) const
 {
+    if (m_accessible == NoDaemon)
+        return -1;
     CommandLine dcmd{"docker", {"exec", m_container}};
     dcmd.addArgs(cmd);
 
diff --git a/src/plugins/docker/dockerdevice.h b/src/plugins/docker/dockerdevice.h
index 35ba3f1c87f..0c3eb5cb654 100644
--- a/src/plugins/docker/dockerdevice.h
+++ b/src/plugins/docker/dockerdevice.h
@@ -107,6 +107,8 @@ public:
 
     void tryCreateLocalFileAccess() const;
     bool hasLocalFileAccess() const;
+    bool isDaemonRunning() const;
+    void resetDaemonState();
     void setMounts(const QStringList &mounts) const;
 
     Utils::FilePath mapToLocalAccess(const Utils::FilePath &filePath) const;
diff --git a/src/plugins/perfprofiler/CMakeLists.txt b/src/plugins/perfprofiler/CMakeLists.txt
index f7f6c91aa04..d83e9e65523 100644
--- a/src/plugins/perfprofiler/CMakeLists.txt
+++ b/src/plugins/perfprofiler/CMakeLists.txt
@@ -38,16 +38,12 @@ set(PERFPROFILER_CPP_SOURCES
   perftracepointdialog.cpp perftracepointdialog.h perftracepointdialog.ui
 )
 
-add_qtc_plugin(PerfProfiler
-  DEPENDS Tracing Qt5::QuickWidgets
-  PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport
-  SOURCES
-    ${TEST_SOURCES}
-)
-
 if(${Qt5_VERSION} VERSION_LESS "6.2.0")
-  extend_qtc_plugin(PerfProfiler
+  add_qtc_plugin(PerfProfiler
+    DEPENDS Tracing Qt5::QuickWidgets
+    PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport
     SOURCES
+      ${TEST_SOURCES}
       ${PERFPROFILER_CPP_SOURCES}
       perfprofiler.qrc
   )
@@ -56,6 +52,13 @@ else() # < Qt 6.2
     return()
   endif()
 
+  add_qtc_plugin(PerfProfiler
+    DEPENDS Tracing Qt5::QuickWidgets
+    PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport
+    SOURCES
+      ${TEST_SOURCES}
+  )
+
   qt_add_resources(PerfProfiler perfprofiler
     PREFIX "/perfprofiler"
     tracepoints.sh
diff --git a/src/plugins/projectexplorer/msvctoolchain.cpp b/src/plugins/projectexplorer/msvctoolchain.cpp
index d7f12d4a7ca..cc637f17fe1 100644
--- a/src/plugins/projectexplorer/msvctoolchain.cpp
+++ b/src/plugins/projectexplorer/msvctoolchain.cpp
@@ -1861,7 +1861,10 @@ static void detectCppBuildTools2015(QList<ToolChain *> *list)
 QList<ToolChain *> MsvcToolChainFactory::autoDetect(const QList<ToolChain *> &alreadyKnown,
                                                     const IDevice::Ptr &device)
 {
-    Q_UNUSED(device)
+    if (!device.isNull()) {
+        // FIXME currently no support for msvc toolchains on a device
+        return {};
+    }
 
     QList<ToolChain *> results;
 
@@ -1969,8 +1972,10 @@ QList<ToolChain *> ClangClToolChainFactory::autoDetect(const QList<ToolChain *>
                                                        const IDevice::Ptr &device)
 {
     Q_UNUSED(alreadyKnown)
-    Q_UNUSED(device) // FIXME: Use it.
-
+    if (!device.isNull()) {
+        // FIXME currently no support for msvc toolchains on a device
+        return {};
+    }
 #ifdef Q_OS_WIN64
     const char registryNode[] = "HKEY_LOCAL_MACHINE\\SOFTWARE\\WOW6432Node\\LLVM\\LLVM";
 #else
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index 0ec4647ad9c..b48149ec7a1 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -1140,36 +1140,48 @@ bool ProjectExplorerPlugin::initialize(const QStringList &arguments, QString *er
 
     // deploy session
     dd->m_deploySessionAction = new QAction(tr("Deploy"), this);
+    dd->m_deploySessionAction->setWhatsThis(tr("Deploy All Projects"));
     cmd = ActionManager::registerAction(dd->m_deploySessionAction, Constants::DEPLOYSESSION);
+    cmd->setDescription(dd->m_deploySessionAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_ALLPROJECTS);
     msessionContextMenu->addAction(cmd, Constants::G_SESSION_BUILD);
 
     // rebuild session action
     dd->m_rebuildSessionAction = new QAction(Icons::REBUILD.icon(), tr("Rebuild"),
                                              this);
+    dd->m_rebuildSessionAction->setWhatsThis(tr("Rebuild All Projects"));
     cmd = ActionManager::registerAction(dd->m_rebuildSessionAction, Constants::REBUILDSESSION);
+    cmd->setDescription(dd->m_rebuildSessionAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_ALLPROJECTS);
     msessionContextMenu->addAction(cmd, Constants::G_SESSION_REBUILD);
 
     dd->m_rebuildSessionForAllConfigsAction
             = new QAction(Icons::REBUILD.icon(), tr("Rebuild"),
                           this);
+    dd->m_rebuildSessionForAllConfigsAction->setWhatsThis(
+        tr("Rebuild All Projects for All Configurations"));
     cmd = ActionManager::registerAction(dd->m_rebuildSessionForAllConfigsAction,
                                         Constants::REBUILDSESSIONALLCONFIGS);
+    cmd->setDescription(dd->m_rebuildSessionForAllConfigsAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_ALLPROJECTS_ALLCONFIGURATIONS);
     msessionContextMenu->addAction(cmd, Constants::G_SESSION_REBUILD);
 
     // clean session
     dd->m_cleanSessionAction = new QAction(Utils::Icons::CLEAN.icon(), tr("Clean"),
                                            this);
+    dd->m_cleanSessionAction->setWhatsThis(tr("Clean All Projects"));
     cmd = ActionManager::registerAction(dd->m_cleanSessionAction, Constants::CLEANSESSION);
+    cmd->setDescription(dd->m_cleanSessionAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_ALLPROJECTS);
     msessionContextMenu->addAction(cmd, Constants::G_SESSION_REBUILD);
 
     dd->m_cleanSessionForAllConfigsAction = new QAction(Utils::Icons::CLEAN.icon(),
             tr("Clean"), this);
+    dd->m_cleanSessionForAllConfigsAction->setWhatsThis(
+        tr("Clean All Projects for All Configurations"));
     cmd = ActionManager::registerAction(dd->m_cleanSessionForAllConfigsAction,
                                         Constants::CLEANSESSIONALLCONFIGS);
+    cmd->setDescription(dd->m_cleanSessionForAllConfigsAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_ALLPROJECTS_ALLCONFIGURATIONS);
     msessionContextMenu->addAction(cmd, Constants::G_SESSION_REBUILD);
 
@@ -1215,39 +1227,45 @@ bool ProjectExplorerPlugin::initialize(const QStringList &arguments, QString *er
 
     // deploy action
     dd->m_deployAction = new QAction(tr("Deploy"), this);
+    dd->m_deployAction->setWhatsThis(tr("Deploy Project"));
     cmd = ActionManager::registerAction(dd->m_deployAction, Constants::DEPLOY);
     cmd->setAttribute(Command::CA_UpdateText);
-    cmd->setDescription(dd->m_deployAction->text());
+    cmd->setDescription(dd->m_deployAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_PROJECT);
 
     // rebuild action
     dd->m_rebuildAction = new QAction(Icons::REBUILD.icon(), tr("Rebuild"), this);
+    dd->m_rebuildAction->setWhatsThis(tr("Rebuild Project"));
     cmd = ActionManager::registerAction(dd->m_rebuildAction, Constants::REBUILD);
     cmd->setAttribute(Command::CA_UpdateText);
-    cmd->setDescription(dd->m_rebuildAction->text());
+    cmd->setDescription(dd->m_rebuildAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_PROJECT);
 
     dd->m_rebuildProjectForAllConfigsAction
             = new QAction(Icons::REBUILD.icon(), tr("Rebuild"), this);
+    dd->m_rebuildProjectForAllConfigsAction->setWhatsThis(
+        tr("Rebuild Project for All Configurations"));
     cmd = ActionManager::registerAction(dd->m_rebuildProjectForAllConfigsAction,
                                         Constants::REBUILDALLCONFIGS);
     cmd->setAttribute(Command::CA_UpdateText);
-    cmd->setDescription(dd->m_rebuildProjectForAllConfigsAction->text());
+    cmd->setDescription(dd->m_rebuildProjectForAllConfigsAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_PROJECT_ALLCONFIGURATIONS);
 
     // clean action
     dd->m_cleanAction = new QAction(Utils::Icons::CLEAN.icon(), tr("Clean"), this);
+    dd->m_cleanAction->setWhatsThis(tr("Clean Project"));
     cmd = ActionManager::registerAction(dd->m_cleanAction, Constants::CLEAN);
     cmd->setAttribute(Command::CA_UpdateText);
-    cmd->setDescription(dd->m_cleanAction->text());
+    cmd->setDescription(dd->m_cleanAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_PROJECT);
 
     dd->m_cleanProjectForAllConfigsAction
             = new QAction(Utils::Icons::CLEAN.icon(), tr("Clean"), this);
+    dd->m_cleanProjectForAllConfigsAction->setWhatsThis(tr("Clean Project for All Configurations"));
     cmd = ActionManager::registerAction(dd->m_cleanProjectForAllConfigsAction,
                                         Constants::CLEANALLCONFIGS);
     cmd->setAttribute(Command::CA_UpdateText);
-    cmd->setDescription(dd->m_cleanProjectForAllConfigsAction->text());
+    cmd->setDescription(dd->m_cleanProjectForAllConfigsAction->whatsThis());
     mbuild->addAction(cmd, Constants::G_BUILD_PROJECT_ALLCONFIGURATIONS);
 
     // cancel build action
diff --git a/src/plugins/projectexplorer/projectmodels.cpp b/src/plugins/projectexplorer/projectmodels.cpp
index 1ba9625ecf2..0565edcc523 100644
--- a/src/plugins/projectexplorer/projectmodels.cpp
+++ b/src/plugins/projectexplorer/projectmodels.cpp
@@ -61,6 +61,7 @@
 #include <QVBoxLayout>
 
 #include <functional>
+#include <iterator>
 #include <tuple>
 #include <vector>
 
@@ -69,6 +70,28 @@ using namespace Utils;
 namespace ProjectExplorer {
 namespace Internal {
 
+/// An output iterator whose assignment operator appends a clone of the operand to the list of
+/// children of the WrapperNode passed to the constructor.
+class Appender : public std::iterator<std::output_iterator_tag, void, void, void, void>
+{
+public:
+    explicit Appender(WrapperNode *parent) : m_parent(parent) {}
+
+    Appender &operator=(const WrapperNode *node)
+    {
+        if (node)
+            m_parent->appendClone(*node);
+        return *this;
+    }
+
+    Appender &operator*() { return *this; }
+    Appender &operator++() { return *this; }
+    Appender &operator++(int) { return *this; }
+
+private:
+    WrapperNode *m_parent;
+};
+
 bool compareNodes(const Node *n1, const Node *n2)
 {
     if (n1->priority() > n2->priority())
@@ -82,9 +105,7 @@ bool compareNodes(const Node *n1, const Node *n2)
 
     const int filePathResult = caseFriendlyCompare(n1->filePath().toString(),
                                  n2->filePath().toString());
-    if (filePathResult != 0)
-        return filePathResult < 0;
-    return n1 < n2; // sort by pointer value
+    return filePathResult < 0;
 }
 
 static bool sortWrapperNodes(const WrapperNode *w1, const WrapperNode *w2)
@@ -92,6 +113,71 @@ static bool sortWrapperNodes(const WrapperNode *w1, const WrapperNode *w2)
     return compareNodes(w1->m_node, w2->m_node);
 }
 
+/// Appends to `dest` clones of children of `first` and `second`, removing duplicates (recursively).
+///
+/// \param first, second
+///   Nodes with children sorted by sortWrapperNodes.
+/// \param dest
+///   Node to which to append clones of children of `first` and `second`, with duplicates removed.
+static void appendMergedChildren(const WrapperNode *first, const WrapperNode *second, WrapperNode *dest)
+{
+    setUnionMerge(first->begin(), first->end(),
+                  second->begin(), second->end(),
+                  Appender(dest),
+                  [dest](const WrapperNode *childOfFirst, const WrapperNode *childOfSecond)
+                  -> const WrapperNode * {
+                      if (childOfSecond->hasChildren()) {
+                          if (childOfFirst->hasChildren()) {
+                              WrapperNode *mergeResult = new WrapperNode(childOfFirst->m_node);
+                              dest->appendChild(mergeResult);
+                              appendMergedChildren(childOfFirst, childOfSecond, mergeResult);
+                              // mergeResult has already been appended to the parent's list of
+                              // children -- there's no need for the Appender to do it again.
+                              // That's why we return a null pointer.
+                              return nullptr;
+                          } else {
+                              return childOfSecond;
+                          }
+                      } else {
+                          return childOfFirst;
+                      }
+                  },
+                  sortWrapperNodes);
+}
+
+/// Given a node `parent` with children sorted by the criteria defined in sortWrapperNodes(), merge
+/// any children that are equal according to those criteria.
+static void mergeDuplicates(WrapperNode *parent)
+{
+    // We assume all descendants of 'parent' are sorted
+    int childIndex = 0;
+    while (childIndex + 1 < parent->childCount()) {
+        const WrapperNode *child = parent->childAt(childIndex);
+        const WrapperNode *nextChild = parent->childAt(childIndex + 1);
+        Q_ASSERT_X(!sortWrapperNodes(nextChild, child), __func__, "Children are not sorted");
+        if (!sortWrapperNodes(child, nextChild)) {
+            // child and nextChild must have the same priorities, display names and folder paths.
+            // Replace them by a single node 'mergeResult` containing the union of their children.
+            auto mergeResult = new WrapperNode(child->m_node);
+            parent->insertChild(childIndex, mergeResult);
+            appendMergedChildren(child, nextChild, mergeResult);
+            // Now we can remove the original children
+            parent->removeChildAt(childIndex + 2);
+            parent->removeChildAt(childIndex + 1);
+        } else {
+            ++childIndex;
+        }
+    }
+}
+
+void WrapperNode::appendClone(const WrapperNode &node)
+{
+    WrapperNode *clone = new WrapperNode(node.m_node);
+    appendChild(clone);
+    for (const WrapperNode *child : node)
+        clone->appendClone(*child);
+}
+
 FlatModel::FlatModel(QObject *parent)
     : TreeModel<WrapperNode, WrapperNode>(new WrapperNode(nullptr), parent)
 {
@@ -393,6 +479,8 @@ void FlatModel::saveExpandData()
 
 void FlatModel::addFolderNode(WrapperNode *parent, FolderNode *folderNode, QSet<Node *> *seen)
 {
+    bool hasHiddenSourcesOrHeaders = false;
+
     for (Node *node : folderNode->nodes()) {
         if (m_filterGeneratedFiles && node->isGenerated())
             continue;
@@ -403,8 +491,10 @@ void FlatModel::addFolderNode(WrapperNode *parent, FolderNode *folderNode, QSet<
             if (!m_showSourceGroups) {
                 if (subFolderNode->isVirtualFolderType()) {
                     auto vnode = static_cast<VirtualFolderNode *>(subFolderNode);
-                    if (vnode->isSourcesOrHeaders())
+                    if (vnode->isSourcesOrHeaders()) {
                         isHidden = true;
+                        hasHiddenSourcesOrHeaders = true;
+                    }
                 }
             }
             if (!isHidden && !seen->contains(subFolderNode)) {
@@ -423,6 +513,11 @@ void FlatModel::addFolderNode(WrapperNode *parent, FolderNode *folderNode, QSet<
             }
         }
     }
+
+    if (hasHiddenSourcesOrHeaders) {
+        parent->sortChildren(&sortWrapperNodes);
+        mergeDuplicates(parent);
+    }
 }
 
 bool FlatModel::trimEmptyDirectories(WrapperNode *parent)
diff --git a/src/plugins/projectexplorer/projectmodels.h b/src/plugins/projectexplorer/projectmodels.h
index 4c7b4012706..2da85b1a858 100644
--- a/src/plugins/projectexplorer/projectmodels.h
+++ b/src/plugins/projectexplorer/projectmodels.h
@@ -52,6 +52,8 @@ class WrapperNode : public Utils::TypedTreeItem<WrapperNode>
 public:
     explicit WrapperNode(Node *node) : m_node(node) {}
     Node *m_node = nullptr;
+
+    void appendClone(const WrapperNode &node);
 };
 
 class FlatModel : public Utils::TreeModel<WrapperNode, WrapperNode>
diff --git a/src/plugins/projectexplorer/projectnodes.h b/src/plugins/projectexplorer/projectnodes.h
index bba13fe5f15..b739a93f1ca 100644
--- a/src/plugins/projectexplorer/projectnodes.h
+++ b/src/plugins/projectexplorer/projectnodes.h
@@ -361,7 +361,7 @@ public:
     void setIsSourcesOrHeaders(bool on) { m_isSourcesOrHeaders = on; }
 
 private:
-    bool m_isSourcesOrHeaders; // "Sources" or "Headers"
+    bool m_isSourcesOrHeaders = false; // "Sources" or "Headers"
 };
 
 // Documentation inside.
diff --git a/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp b/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp
index 992047bb1fa..f96a86656eb 100644
--- a/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp
+++ b/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp
@@ -190,9 +190,11 @@ bool QbsProjectManagerPlugin::initialize(const QStringList &arguments, QString *
             this, &QbsProjectManagerPlugin::cleanProductContextMenu);
 
     m_cleanProduct = new QAction(Utils::Icons::CLEAN.icon(), tr("Clean"), this);
+    m_cleanProduct->setWhatsThis(tr("Clean Product"));
     command = Core::ActionManager::registerAction(m_cleanProduct, Constants::ACTION_CLEAN_PRODUCT);
     command->setAttribute(Core::Command::CA_Hide);
     command->setAttribute(Core::Command::CA_UpdateText);
+    command->setDescription(m_cleanProduct->whatsThis());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_PRODUCT);
     connect(m_cleanProduct, &QAction::triggered, this, &QbsProjectManagerPlugin::cleanProduct);
 
@@ -205,10 +207,12 @@ bool QbsProjectManagerPlugin::initialize(const QStringList &arguments, QString *
             this, &QbsProjectManagerPlugin::rebuildProductContextMenu);
 
     m_rebuildProduct = new QAction(ProjectExplorer::Icons::REBUILD.icon(), tr("Rebuild"), this);
+    m_rebuildProduct->setWhatsThis(tr("Rebuild Product"));
     command = Core::ActionManager::registerAction(m_rebuildProduct,
                                                   Constants::ACTION_REBUILD_PRODUCT);
     command->setAttribute(Core::Command::CA_Hide);
     command->setAttribute(Core::Command::CA_UpdateText);
+    command->setDescription(m_rebuildProduct->whatsThis());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_PRODUCT);
     connect(m_rebuildProduct, &QAction::triggered, this, &QbsProjectManagerPlugin::rebuildProduct);
 
diff --git a/src/plugins/qmakeprojectmanager/qmakenodes.cpp b/src/plugins/qmakeprojectmanager/qmakenodes.cpp
index 5063d88ae74..da1f89f4eee 100644
--- a/src/plugins/qmakeprojectmanager/qmakenodes.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakenodes.cpp
@@ -377,11 +377,9 @@ QVariant QmakeProFileNode::data(Utils::Id role) const
     if (role == Android::Constants::AndroidSoLibPath) {
         TargetInformation info = targetInformation();
         QStringList res = {info.buildDir.toString()};
-        Utils::FilePath destDir = info.destDir;
+        FilePath destDir = info.destDir;
         if (!destDir.isEmpty()) {
-            if (destDir.toFileInfo().isRelative())
-                destDir = Utils::FilePath::fromString(QDir::cleanPath(info.buildDir.toString()
-                                                                      + '/' + destDir.toString()));
+            destDir = info.buildDir.resolvePath(destDir.path());
             res.append(destDir.toString());
         }
         res.removeDuplicates();
diff --git a/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp b/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp
index 01da9cad48f..603f683f304 100644
--- a/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakeprojectmanagerplugin.cpp
@@ -246,19 +246,21 @@ bool QmakeProjectManagerPlugin::initialize(const QStringList &arguments, QString
 
     d->m_rebuildSubProjectAction = new QAction(Icons::REBUILD.icon(), tr("Rebuild"),
                                              this);
+    d->m_rebuildSubProjectAction->setWhatsThis(tr("Rebuild Subproject"));
     command = ActionManager::registerAction(d->m_rebuildSubProjectAction, Constants::REBUILDSUBDIR, projectContext);
     command->setAttribute(Command::CA_Hide);
     command->setAttribute(Command::CA_UpdateText);
-    command->setDescription(d->m_rebuildSubProjectAction->text());
+    command->setDescription(d->m_rebuildSubProjectAction->whatsThis());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_SUBPROJECT);
     connect(d->m_rebuildSubProjectAction, &QAction::triggered,
             d, &QmakeProjectManagerPluginPrivate::rebuildSubDirContextMenu);
 
     d->m_cleanSubProjectAction = new QAction(Utils::Icons::CLEAN.icon(),tr("Clean"), this);
+    d->m_cleanSubProjectAction->setWhatsThis(tr("Clean Subproject"));
     command = ActionManager::registerAction(d->m_cleanSubProjectAction, Constants::CLEANSUBDIR, projectContext);
     command->setAttribute(Command::CA_Hide);
     command->setAttribute(Command::CA_UpdateText);
-    command->setDescription(d->m_cleanSubProjectAction->text());
+    command->setDescription(d->m_cleanSubProjectAction->whatsThis());
     mbuild->addAction(command, ProjectExplorer::Constants::G_BUILD_SUBPROJECT);
     connect(d->m_cleanSubProjectAction, &QAction::triggered,
             d, &QmakeProjectManagerPluginPrivate::cleanSubDirContextMenu);
diff --git a/src/plugins/qmlprofiler/CMakeLists.txt b/src/plugins/qmlprofiler/CMakeLists.txt
index 295bc3d0bb9..c5fa5399f86 100644
--- a/src/plugins/qmlprofiler/CMakeLists.txt
+++ b/src/plugins/qmlprofiler/CMakeLists.txt
@@ -69,16 +69,12 @@ set(QMLPROFILER_CPP_SOURCES
   scenegraphtimelinemodel.cpp scenegraphtimelinemodel.h
 )
 
-add_qtc_plugin(QmlProfiler
-  DEPENDS QmlDebug QmlJS Tracing Qt5::QuickWidgets
-  PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport TextEditor
-  SOURCES
-    ${TEST_SOURCES}
-)
-
 if(${Qt5_VERSION} VERSION_LESS "6.2.0")
-  extend_qtc_plugin(QmlProfiler
+  add_qtc_plugin(QmlProfiler
+    DEPENDS QmlDebug QmlJS Tracing Qt5::QuickWidgets
+    PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport TextEditor
     SOURCES
+      ${TEST_SOURCES}
       ${QMLPROFILER_CPP_SOURCES}
       qml/qmlprofiler.qrc
   )
@@ -87,6 +83,13 @@ else() # < Qt 6.2
     return()
   endif()
 
+  add_qtc_plugin(QmlProfiler
+    DEPENDS QmlDebug QmlJS Tracing Qt5::QuickWidgets
+    PLUGIN_DEPENDS Core Debugger ProjectExplorer QtSupport TextEditor
+    SOURCES
+      ${TEST_SOURCES}
+  )
+
   set(QMLPROFILER_QML_FILES
     qml/QmlProfilerFlameGraphView.qml
   )
diff --git a/tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp b/tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp
index b3633ff614a..c512b372cd0 100644
--- a/tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp
+++ b/tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp
@@ -272,14 +272,14 @@ void tst_TestCore::loadEmptyCoreModel()
     QVERIFY(compareTree(testRewriterView1->rootModelNode(), testRewriterView2->rootModelNode()));
 }
 
-void tst_TestCore::testRewriterView()
+void tst_TestCore::testRewriterView2()
 {
     try {
         QPlainTextEdit textEdit;
-        textEdit.setPlainText("import QtQuick 2.15;\n\nItem {\n}\n");
+        textEdit.setPlainText("import QtQuick 2.15;\n\nRectangle {\n}\n");
         NotIndentingTextEditModifier textModifier(&textEdit);
 
-        QScopedPointer<Model> model(Model::create("QtQuick.Item"));
+        QScopedPointer<Model> model(Model::create("QtQuick.Rectangle", 2, 1));
         QVERIFY(model.data());
 
         QScopedPointer<TestView> view(new TestView(model.data()));
@@ -292,15 +292,20 @@ void tst_TestCore::testRewriterView()
         testRewriterView->setTextModifier(&textModifier);
         model->attachView(testRewriterView.data());
 
-        ModelNode childNode(addNodeListChild(rootModelNode, "QtQuick.Rectangle", 1, 0, "data"));
+        while (testRewriterView->hasIncompleteTypeInformation()) {
+            QApplication::processEvents(QEventLoop::AllEvents, 1000);
+        }
+
+        ModelNode childNode(addNodeListChild(rootModelNode, "QtQuick.Rectangle", 2, 11, "data"));
+
         QVERIFY(childNode.isValid());
         childNode.setIdWithoutRefactoring("childNode");
 
-        ModelNode childNode2(addNodeListChild(childNode, "QtQuick.Rectangle", 1, 0, "data"));
+        ModelNode childNode2(addNodeListChild(childNode, "QtQuick.Rectangle", 2, 11, "data"));
         childNode2.setIdWithoutRefactoring("childNode2");
-        ModelNode childNode3(addNodeListChild(childNode2, "QtQuick.Rectangle", 1, 0, "data"));
+        ModelNode childNode3(addNodeListChild(childNode2, "QtQuick.Rectangle", 2, 11, "data"));
         childNode3.setIdWithoutRefactoring("childNode3");
-        ModelNode childNode4(addNodeListChild(childNode3, "QtQuick.Rectangle", 1, 0, "data"));
+        ModelNode childNode4(addNodeListChild(childNode3, "QtQuick.Rectangle", 2, 11, "data"));
         childNode4.setIdWithoutRefactoring("childNode4");
 
         QVERIFY(childNode.isValid());
@@ -326,7 +331,7 @@ void tst_TestCore::testRewriterView()
 
         testRewriterView->modelToTextMerger()->applyChanges();
 
-        childNode = addNodeListChild(rootModelNode, "QtQuick.Rectangle", 2, 0, "data");
+        childNode = addNodeListChild(rootModelNode, "QtQuick.Rectangle", 2, 11, "data");
         QVERIFY(testRewriterView->modelToTextMerger()->isNodeScheduledForAddition(childNode));
 
         testRewriterView->modelToTextMerger()->applyChanges();
@@ -334,6 +339,93 @@ void tst_TestCore::testRewriterView()
         childNode.variantProperty("x").setValue(70);
         childNode.variantProperty("y").setValue(90);
 
+        QCOMPARE(testRewriterView->modelToTextMerger()
+                     ->findAddedVariantProperty(childNode.variantProperty("x"))
+                     .value(),
+                 QVariant(70));
+        QCOMPARE(testRewriterView->modelToTextMerger()
+                     ->findAddedVariantProperty(childNode.variantProperty("y"))
+                     .value(),
+                 QVariant(90));
+
+        model->detachView(testRewriterView.data());
+    } catch (Exception &e) {
+        QFAIL(qPrintable(e.description()));
+    }
+}
+
+void tst_TestCore::testRewriterView()
+{
+    try {
+        const QLatin1String qmlString("import QtQuick 2.15\n"
+                                      "Rectangle {\n"
+                                      "}\n");
+
+        QPlainTextEdit textEdit;
+        textEdit.setPlainText(qmlString);
+        NotIndentingTextEditModifier textModifier(&textEdit);
+
+        QScopedPointer<Model> model(Model::create("QtQuick.Item", 2, 15));
+        QVERIFY(model.data());
+
+        QScopedPointer<TestRewriterView> testRewriterView(new TestRewriterView());
+        testRewriterView->setTextModifier(&textModifier);
+        testRewriterView->setCheckSemanticErrors(true);
+        model->attachView(testRewriterView.data());
+
+        while (testRewriterView->hasIncompleteTypeInformation()) {
+            QApplication::processEvents(QEventLoop::AllEvents, 1000);
+        }
+
+        textEdit.setPlainText(qmlString);
+
+        ModelNode rootModelNode = testRewriterView->rootModelNode();
+
+        ModelNode childNode(addNodeListChild(rootModelNode, "QtQuick.Rectangle", 2, 11, "data"));
+
+        QVERIFY(childNode.isValid());
+        childNode.setIdWithoutRefactoring("childNode");
+
+        ModelNode childNode2(addNodeListChild(childNode, "QtQuick.Rectangle", 2, 11, "data"));
+        childNode2.setIdWithoutRefactoring("childNode2");
+        ModelNode childNode3(addNodeListChild(childNode2, "QtQuick.Rectangle", 2, 11, "data"));
+        childNode3.setIdWithoutRefactoring("childNode3");
+        ModelNode childNode4(addNodeListChild(childNode3, "QtQuick.Rectangle", 2, 11, "data"));
+        childNode4.setIdWithoutRefactoring("childNode4");
+
+        QVERIFY(childNode.isValid());
+        QVERIFY(childNode2.isValid());
+        QVERIFY(childNode3.isValid());
+        QVERIFY(childNode4.isValid());
+
+        testRewriterView->setModificationGroupActive(true);
+
+        childNode.destroy();
+
+        QVERIFY(!childNode.isValid());
+        QVERIFY(!childNode2.isValid());
+        QVERIFY(!childNode3.isValid());
+        QVERIFY(!childNode4.isValid());
+
+        QVERIFY(testRewriterView->modelToTextMerger()->isNodeScheduledForRemoval(childNode));
+        QVERIFY(!testRewriterView->modelToTextMerger()->isNodeScheduledForRemoval(childNode2));
+        QVERIFY(!testRewriterView->modelToTextMerger()->isNodeScheduledForRemoval(childNode3));
+        QVERIFY(!testRewriterView->modelToTextMerger()->isNodeScheduledForRemoval(childNode4));
+
+        QVERIFY(!rootModelNode.hasProperty("data"));
+
+        testRewriterView->modelToTextMerger()->applyChanges();
+
+        childNode = addNodeListChild(rootModelNode, "QtQuick.Rectangle", 2, 11, "data");
+        QVERIFY(testRewriterView->modelToTextMerger()->isNodeScheduledForAddition(childNode));
+        QVERIFY(childNode.isValid());
+
+        testRewriterView->modelToTextMerger()->applyChanges();
+
+        QVERIFY(childNode.isValid());
+        childNode.variantProperty("x").setValue(70);
+        childNode.variantProperty("y").setValue(90);
+
         QCOMPARE(testRewriterView->modelToTextMerger()->findAddedVariantProperty(childNode.variantProperty("x")).value(), QVariant(70));
         QCOMPARE(testRewriterView->modelToTextMerger()->findAddedVariantProperty(childNode.variantProperty("y")).value(), QVariant(90));
 
diff --git a/tests/auto/qml/qmldesigner/coretests/tst_testcore.h b/tests/auto/qml/qmldesigner/coretests/tst_testcore.h
index 51bd8f496d6..d052bf950e5 100644
--- a/tests/auto/qml/qmldesigner/coretests/tst_testcore.h
+++ b/tests/auto/qml/qmldesigner/coretests/tst_testcore.h
@@ -95,6 +95,7 @@ private slots:
     // unit tests Rewriter
     //
     void testRewriterView();
+    void testRewriterView2();
     void testRewriterErrors();
     void testRewriterChangeId();
     void testRewriterRemoveId();
diff --git a/tests/auto/tracing/flamegraphview/CMakeLists.txt b/tests/auto/tracing/flamegraphview/CMakeLists.txt
index f64a90d4d3b..a1e900b7288 100644
--- a/tests/auto/tracing/flamegraphview/CMakeLists.txt
+++ b/tests/auto/tracing/flamegraphview/CMakeLists.txt
@@ -1,19 +1,20 @@
-add_qtc_test(tst_tracing_flamegraphview
-  DEPENDS Tracing Qt5::QuickWidgets Qt5::Quick Utils
-)
-
 set(TSTFLAMEGRAPHVIEW_CPP_SOURCES
   testflamegraphmodel.h
   tst_flamegraphview.cpp
 )
 
 if(${Qt5_VERSION} VERSION_LESS "6.2.0")
-  extend_qtc_test(tst_tracing_flamegraphview
+  add_qtc_test(tst_tracing_flamegraphview
+    DEPENDS Tracing Qt5::QuickWidgets Qt5::Quick Utils
     SOURCES
       ${TSTFLAMEGRAPHVIEW_CPP_SOURCES}
       flamegraphview.qrc
   )
 else() # < Qt 6.2
+  add_qtc_test(tst_tracing_flamegraphview
+    DEPENDS Tracing Qt5::QuickWidgets Qt5::Quick Utils
+  )
+
   qt_add_qml_module(tst_tracing_flamegraphview
     URI "QtCreator.TstTracingFlameGraphView"
     VERSION "1.0"
diff --git a/tests/auto/utils/CMakeLists.txt b/tests/auto/utils/CMakeLists.txt
index 4b341d6b3c1..63eb475063b 100644
--- a/tests/auto/utils/CMakeLists.txt
+++ b/tests/auto/utils/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_subdirectory(ansiescapecodehandler)
 add_subdirectory(fileutils)
 add_subdirectory(fuzzymatcher)
+add_subdirectory(indexedcontainerproxyconstiterator)
 add_subdirectory(persistentsettings)
 add_subdirectory(qtcprocess)
 add_subdirectory(settings)
diff --git a/tests/auto/utils/indexedcontainerproxyconstiterator/CMakeLists.txt b/tests/auto/utils/indexedcontainerproxyconstiterator/CMakeLists.txt
new file mode 100644
index 00000000000..00a6adb4ed9
--- /dev/null
+++ b/tests/auto/utils/indexedcontainerproxyconstiterator/CMakeLists.txt
@@ -0,0 +1,4 @@
+add_qtc_test(tst_utils_indexedcontainerproxyconstiterator
+  DEPENDS Utils
+  SOURCES tst_indexedcontainerproxyconstiterator.cpp
+)
diff --git a/tests/auto/utils/indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.pro b/tests/auto/utils/indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.pro
new file mode 100644
index 00000000000..b0f9d7cc7e3
--- /dev/null
+++ b/tests/auto/utils/indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.pro
@@ -0,0 +1,4 @@
+QTC_LIB_DEPENDS += utils
+include(../../qttest.pri)
+
+SOURCES += tst_indexedcontainerproxyconstiterator.cpp
diff --git a/tests/auto/utils/indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.qbs b/tests/auto/utils/indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.qbs
new file mode 100644
index 00000000000..461c89e4866
--- /dev/null
+++ b/tests/auto/utils/indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.qbs
@@ -0,0 +1,7 @@
+import qbs
+
+QtcAutotest {
+    name: "IndexedContainerProxyConstIterator autotest"
+    Depends { name: "Utils" }
+    files: "tst_indexedcontainerproxyconstiterator.cpp"
+}
diff --git a/tests/auto/utils/indexedcontainerproxyconstiterator/tst_indexedcontainerproxyconstiterator.cpp b/tests/auto/utils/indexedcontainerproxyconstiterator/tst_indexedcontainerproxyconstiterator.cpp
new file mode 100644
index 00000000000..f0dceb0eb24
--- /dev/null
+++ b/tests/auto/utils/indexedcontainerproxyconstiterator/tst_indexedcontainerproxyconstiterator.cpp
@@ -0,0 +1,209 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include <utils/indexedcontainerproxyconstiterator.h>
+
+#include <QtTest>
+
+#include <string>
+#include <vector>
+
+using namespace Utils;
+
+class tst_IndexedContainerProxyConstIterator : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void initTestCase();
+    void testConstruction();
+    void testDereference();
+    void testIndexing();
+    void testComparisons();
+    void testIncrement();
+    void testDecrement();
+    void testPlus();
+    void testMinus();
+    void testIteration();
+
+private:
+    using StringContainer = std::vector<std::string>;
+    using StringIterator = IndexedContainerProxyConstIterator<StringContainer>;
+    StringContainer strings;
+
+    using BoolContainer = std::vector<bool>;
+    using BoolIterator = IndexedContainerProxyConstIterator<BoolContainer>;
+    BoolContainer bools;
+};
+
+void tst_IndexedContainerProxyConstIterator::initTestCase()
+{
+    strings = {"abc", "defgh", "ijk"};
+    bools = {false, true, false};
+}
+
+void tst_IndexedContainerProxyConstIterator::testConstruction()
+{
+    StringIterator strIt(strings, 0);
+    QCOMPARE(*strIt, "abc");
+
+    StringIterator strIt2(strings, 1);
+    QCOMPARE(*strIt2, "defgh");
+
+    BoolIterator boolIt(bools, 0);
+    QCOMPARE(*boolIt, false);
+
+    BoolIterator boolIt2(bools, 1);
+    QCOMPARE(*boolIt2, true);
+}
+
+void tst_IndexedContainerProxyConstIterator::testDereference()
+{
+    StringIterator strIt(strings, 0);
+    QCOMPARE(*strIt, "abc");
+    QCOMPARE(strIt->length(), 3);
+
+    BoolIterator boolIt(bools, 0);
+    QCOMPARE(*boolIt, false);
+}
+
+void tst_IndexedContainerProxyConstIterator::testIndexing()
+{
+    StringIterator strIt(strings, 0);
+    QCOMPARE(strIt[2], "ijk");
+
+    BoolIterator boolIt(bools, 0);
+    QCOMPARE(boolIt[2], false);
+}
+
+void tst_IndexedContainerProxyConstIterator::testComparisons()
+{
+    StringIterator strIt(strings, 0);
+    StringIterator strIt2(strings, 0);
+    StringIterator strIt3(strings, 1);
+
+    QVERIFY(strIt == strIt);
+    QVERIFY(!(strIt != strIt));
+    QVERIFY(!(strIt < strIt));
+    QVERIFY(strIt <= strIt);
+    QVERIFY(!(strIt > strIt));
+    QVERIFY(strIt >= strIt);
+
+    QVERIFY(strIt == strIt2);
+    QVERIFY(!(strIt != strIt2));
+    QVERIFY(!(strIt < strIt2));
+    QVERIFY(strIt <= strIt2);
+    QVERIFY(!(strIt > strIt2));
+    QVERIFY(strIt >= strIt2);
+
+    QVERIFY(!(strIt == strIt3));
+    QVERIFY(strIt != strIt3);
+    QVERIFY(strIt < strIt3);
+    QVERIFY(strIt <= strIt3);
+    QVERIFY(!(strIt > strIt3));
+    QVERIFY(!(strIt >= strIt3));
+
+    QVERIFY(!(strIt3 == strIt));
+    QVERIFY(strIt3 != strIt);
+    QVERIFY(!(strIt3 < strIt));
+    QVERIFY(!(strIt3 <= strIt));
+    QVERIFY(strIt3 > strIt);
+    QVERIFY(strIt3 >= strIt);
+}
+
+void tst_IndexedContainerProxyConstIterator::testIncrement()
+{
+    StringIterator strIt(strings, 0);
+    QCOMPARE(*(++strIt), "defgh");
+    QCOMPARE(*(strIt++), "defgh");
+    QCOMPARE(*strIt, "ijk");
+
+    BoolIterator boolIt(bools, 0);
+    QCOMPARE(*(++boolIt), true);
+    QCOMPARE(*(boolIt++), true);
+    QCOMPARE(*boolIt, false);
+}
+
+void tst_IndexedContainerProxyConstIterator::testDecrement()
+{
+    StringIterator strIt(strings, 3);
+    QCOMPARE(*(--strIt), "ijk");
+    QCOMPARE(*(strIt--), "ijk");
+    QCOMPARE(*strIt, "defgh");
+
+    BoolIterator boolIt(bools, 3);
+    QCOMPARE(*(--boolIt), false);
+    QCOMPARE(*(boolIt--), false);
+    QCOMPARE(*boolIt, true);
+}
+
+void tst_IndexedContainerProxyConstIterator::testPlus()
+{
+    StringIterator strIt(strings, 1);
+    QCOMPARE(*(strIt + 1), "ijk");
+    QCOMPARE(*(1 + strIt), "ijk");
+    strIt += 1;
+    QCOMPARE(*strIt, "ijk");
+
+    BoolIterator boolIt(bools, 1);
+    QCOMPARE(*(boolIt + 1), false);
+    QCOMPARE(*(1 + boolIt), false);
+    boolIt += 1;
+    QCOMPARE(*boolIt, false);
+}
+
+void tst_IndexedContainerProxyConstIterator::testMinus()
+{
+    StringIterator strIt(strings, 1);
+    QCOMPARE(*(strIt - 1), "abc");
+    strIt -= 1;
+    QCOMPARE(*strIt, "abc");
+
+    BoolIterator boolIt(bools, 1);
+    QCOMPARE(*(boolIt - 1), false);
+    boolIt -= 1;
+    QCOMPARE(*boolIt, false);
+}
+
+void tst_IndexedContainerProxyConstIterator::testIteration()
+{
+    StringIterator strBegin(strings, 0);
+    StringIterator strEnd(strings, strings.size());
+    StringContainer stringsCopy;
+    for (StringIterator it = strBegin; it != strEnd; ++it)
+        stringsCopy.push_back(*it);
+    QCOMPARE(stringsCopy, strings);
+
+    BoolIterator boolBegin(bools, 0);
+    BoolIterator boolEnd(bools, bools.size());
+    BoolContainer boolsCopy;
+    for (BoolIterator it = boolBegin; it != boolEnd; ++it)
+        boolsCopy.push_back(*it);
+    QCOMPARE(boolsCopy, bools);
+}
+
+QTEST_MAIN(tst_IndexedContainerProxyConstIterator)
+
+#include "tst_indexedcontainerproxyconstiterator.moc"
diff --git a/tests/auto/utils/utils.pro b/tests/auto/utils/utils.pro
index 2e15c4379ed..e0f630ad2b5 100644
--- a/tests/auto/utils/utils.pro
+++ b/tests/auto/utils/utils.pro
@@ -4,6 +4,7 @@ SUBDIRS = \
     fileutils \
     ansiescapecodehandler \
     fuzzymatcher \
+    indexedcontainerproxyconstiterator \
     persistentsettings \
     qtcprocess \
     settings \
diff --git a/tests/auto/utils/utils.qbs b/tests/auto/utils/utils.qbs
index 5b11f46e7bc..b9a4f9a6116 100644
--- a/tests/auto/utils/utils.qbs
+++ b/tests/auto/utils/utils.qbs
@@ -6,6 +6,7 @@ Project {
         "fileutils/fileutils.qbs",
         "ansiescapecodehandler/ansiescapecodehandler.qbs",
         "fuzzymatcher/fuzzymatcher.qbs",
+        "indexedcontainerproxyconstiterator/indexedcontainerproxyconstiterator.qbs",
         "persistentsettings/persistentsettings.qbs",
         "qtcprocess/qtcprocess.qbs",
         "settings/settings.qbs",