diff --git a/doc/qtcreator/images/qtcreator-build-settings-cmake-configure.webp b/doc/qtcreator/images/qtcreator-build-settings-cmake-configure.webp
index 4b38b162f4c..0038dc47631 100644
Binary files a/doc/qtcreator/images/qtcreator-build-settings-cmake-configure.webp and b/doc/qtcreator/images/qtcreator-build-settings-cmake-configure.webp differ
diff --git a/doc/qtcreator/src/debugger/qtquick-debugging.qdoc b/doc/qtcreator/src/debugger/qtquick-debugging.qdoc
index 833cbe69c47..c0246fc7b6f 100644
--- a/doc/qtcreator/src/debugger/qtquick-debugging.qdoc
+++ b/doc/qtcreator/src/debugger/qtquick-debugging.qdoc
@@ -38,22 +38,26 @@
     The process of setting up debugging for Qt Quick projects depends on the
     \l{Creating Qt Quick Projects}{type of the project}: Qt Quick UI or Qt Quick
     Application, and the Qt version used.
+
+    \section2 Debugging Qt Quick UI Projects
     \endif
 
-    To debug Qt Quick UI projects, select the \uicontrol {Enable QML} check box in the
-    \uicontrol {Debugger Settings} in \uicontrol Projects mode \uicontrol {Run Settings}.
+    To debug Qt Quick UI projects (.qmlproject), select the
+    \uicontrol {Enable QML} check box in \uicontrol {Debugger settings}
+    in \uicontrol Projects mode \uicontrol {Run Settings}.
 
     \if defined(qtcreator)
+    \section2 Debugging Qt Quick Applications
+
     To debug Qt Quick Applications:
 
         \list 1
 
-        \li If you use qmake as the build system, make sure that
-            debugging is enabled in the \uicontrol {Build Settings},
-            \uicontrol {QML debugging and profiling} field, either
-            explicitly for the project or globally by default.
+        \li To create a build configuration that supports QML debugging,
+            select \uicontrol {Projects} > \uicontrol {Build} >
+            \uicontrol {QML debugging and profiling} > \uicontrol Enable.
 
-            \image qtcreator-projectpane.png "qmake general build settings pane"
+            \image qtcreator-build-settings-cmake-configure.webp {Build settings for a CMake project}
 
             \note Debugging requires opening a socket at a TCP port,
             which presents a security risk. Anyone on the Internet could connect
@@ -61,9 +65,9 @@
             functions. Therefore, you must make sure that the port is properly
             protected by a firewall.
 
-        \li In the \uicontrol {Run Settings}, \uicontrol {Debugger Settings} section, select
-            the \uicontrol {Enable QML} check box to enable
-            QML debugging.
+        \li In \uicontrol {Run Settings} > \uicontrol {Debugger settings}, select
+            the \uicontrol {Enable QML} check box to enable QML debugging for
+            running applications.
 
         \li Select \uicontrol Build > \uicontrol {Rebuild Project} to clean and
             rebuild the project.
@@ -79,6 +83,43 @@
     automatically installed during \QC and Qt installation. Do not delete
     them if you plan to debug QML applications.
 
+    \section2 Using Default Values
+
+    You can enable or disable QML debugging globally in \uicontrol Edit >
+    \uicontrol Preferences > \uicontrol {Build & Run} >
+    \uicontrol {Default Build Properties}.
+
+    \image qtcreator-build-settings-default.png "Default Build Properties tab in Build & Run Preferences"
+
+    The value of the \uicontrol {QML debugging} field determines what happens
+    when creating new build configurations. The values \uicontrol Enable
+    and \uicontrol Disable explicitly set QML debugging for the new build
+    configuration to that value, regardless of what type of build
+    configuration you create.
+
+    \uicontrol {Use Project Default} makes the values depend on the type of
+    build configuration: \uicontrol Debug, \uicontrol Profile, or
+    \uicontrol Release. When you use \l {CMake Build Configuration}{CMake} or
+    \l {qmake Build Configuration}{qmake} as a build system, debug and profile
+    build configurations have QML debugging enabled. However, release build
+    configurations do not include QML debugging because the debugging feature
+    makes applications vulnerable.
+
+    The \uicontrol {Leave at Default} option in \uicontrol {Projects} >
+    \uicontrol {Build} > \uicontrol {QML debugging and profiling} is needed to keep existing,
+    already configured CMake build directories intact. Also, it
+    enables you to import an existing build into \QC without enforced changes,
+    so that you don't have to worry about a complete rebuild of the project, for
+    example. Even if you later change the configuration of the build outside of
+    \QC, it will be kept as you want it.
+
+    There are some known issues in the interaction between the global setting
+    in \uicontrol Edit > \uicontrol Preferences > \uicontrol {Build & Run} >
+    \uicontrol {Default Build Properties} and the build configuration.
+    For example, for qmake the global setting only affects build configurations
+    that are automatically created when enabling a kit. Also, CMake ignores the
+    global setting.
+
     \section1 Mixed C++/QML Debugging
 
     To debug both the C++ and QML parts of your application at the same time,
@@ -87,7 +128,7 @@
     \uicontrol{Run Settings}.
     \endif
 
-    \image qtquick-debugging-settings.png
+    \image qtquick-debugging-settings.png {Debugger settings section in Run Settings}
 
     \section1 Starting QML Debugging
 
diff --git a/src/libs/utils/filesystemwatcher.cpp b/src/libs/utils/filesystemwatcher.cpp
index e0cef5aed99..d1c2e003116 100644
--- a/src/libs/utils/filesystemwatcher.cpp
+++ b/src/libs/utils/filesystemwatcher.cpp
@@ -276,15 +276,19 @@ void FileSystemWatcher::addFiles(const QStringList &files, WatchMode wm)
         const int count = ++d->m_staticData->m_fileCount[file];
         Q_ASSERT(count > 0);
 
-        if (count == 1)
+        if (count == 1) {
             toAdd << file;
 
-        const QString directory = QFileInfo(file).path();
-        const int dirCount = ++d->m_staticData->m_directoryCount[directory];
-        Q_ASSERT(dirCount > 0);
+            QFileInfo fi(file);
+            if (!fi.exists()) {
+                const QString directory = fi.path();
+                const int dirCount = ++d->m_staticData->m_directoryCount[directory];
+                Q_ASSERT(dirCount > 0);
 
-        if (dirCount == 1)
-            toAdd << directory;
+                if (dirCount == 1)
+                    toAdd << directory;
+            }
+        }
     }
 
     if (!toAdd.isEmpty())
@@ -312,15 +316,19 @@ void FileSystemWatcher::removeFiles(const QStringList &files)
         const int count = --(d->m_staticData->m_fileCount[file]);
         Q_ASSERT(count >= 0);
 
-        if (!count)
+        if (!count) {
             toRemove << file;
 
-        const QString directory = QFileInfo(file).path();
-        const int dirCount = --d->m_staticData->m_directoryCount[directory];
-        Q_ASSERT(dirCount >= 0);
+            QFileInfo fi(file);
+            if (!fi.exists()) {
+                const QString directory = fi.path();
+                const int dirCount = --d->m_staticData->m_directoryCount[directory];
+                Q_ASSERT(dirCount >= 0);
 
-        if (!dirCount)
-            toRemove << directory;
+                if (!dirCount)
+                    toRemove << directory;
+            }
+        }
     }
 
     if (!toRemove.isEmpty())
@@ -419,13 +427,27 @@ QStringList FileSystemWatcher::directories() const
 void FileSystemWatcher::slotFileChanged(const QString &path)
 {
     const auto it = d->m_files.find(path);
+    QStringList toAdd;
     if (it != d->m_files.end() && it.value().trigger(path)) {
         qCDebug(fileSystemWatcherLog)
             << this << "triggers on file" << it.key()
             << it.value().watchMode
             << it.value().modifiedTime.toString(Qt::ISODate);
         d->fileChanged(path);
+
+        QFileInfo fi(path);
+        if (!fi.exists()) {
+            const QString directory = fi.path();
+            const int dirCount = ++d->m_staticData->m_directoryCount[directory];
+            Q_ASSERT(dirCount > 0);
+
+            if (dirCount == 1)
+                toAdd << directory;
+        }
     }
+
+    if (!toAdd.isEmpty())
+        d->m_staticData->m_watcher->addPaths(toAdd);
 }
 
 void FileSystemWatcher::slotDirectoryChanged(const QString &path)
@@ -451,9 +473,20 @@ void FileSystemWatcher::slotDirectoryChanged(const QString &path)
         for (const QString &rejected : d->m_staticData->m_watcher->addPaths(toReadd))
             toReadd.removeOne(rejected);
 
+        QStringList toRemove;
         // If we've successfully added the file, that means it was deleted and replaced.
-        for (const QString &reAdded : std::as_const(toReadd))
+        for (const QString &reAdded : std::as_const(toReadd)) {
             d->fileChanged(reAdded);
+            const QString directory = QFileInfo(reAdded).path();
+            const int dirCount = --d->m_staticData->m_directoryCount[directory];
+            Q_ASSERT(dirCount >= 0);
+
+            if (!dirCount)
+                toRemove << directory;
+        }
+
+        if (!toRemove.isEmpty())
+            d->m_staticData->m_watcher->removePaths(toRemove);
     }
 }
 
diff --git a/src/plugins/clangformat/clangformatconfigwidget.cpp b/src/plugins/clangformat/clangformatconfigwidget.cpp
index ae914a39430..e2f9272e146 100644
--- a/src/plugins/clangformat/clangformatconfigwidget.cpp
+++ b/src/plugins/clangformat/clangformatconfigwidget.cpp
@@ -88,8 +88,8 @@ ClangFormatConfigWidget::ClangFormatConfigWidget(TextEditor::ICodeStylePreferenc
 
     d->checksScrollArea->setWidget(d->checksWidget);
     d->checksScrollArea->setWidgetResizable(true);
-    d->checksWidget->setEnabled(!codeStyle->isReadOnly()
-                                && !codeStyle->isTemporarilyReadOnly());
+    d->checksWidget->setEnabled(!codeStyle->isReadOnly() && !codeStyle->isTemporarilyReadOnly()
+                                && !codeStyle->isAdditionalTabDisabled());
 
     FilePath fileName;
     if (d->project)
@@ -140,8 +140,8 @@ void ClangFormatConfigWidget::slotCodeStyleChanged(
     d->config->setIsReadOnly(codeStyle->isReadOnly());
     d->style = d->config->style();
 
-    d->checksWidget->setEnabled(!codeStyle->isReadOnly()
-                                && !codeStyle->isTemporarilyReadOnly());
+    d->checksWidget->setEnabled(!codeStyle->isReadOnly() && !codeStyle->isTemporarilyReadOnly()
+                                && !codeStyle->isAdditionalTabDisabled());
 
     fillTable();
     updatePreview();
diff --git a/src/plugins/clangformat/clangformatglobalconfigwidget.cpp b/src/plugins/clangformat/clangformatglobalconfigwidget.cpp
index 2b4b0028471..24faf9031d1 100644
--- a/src/plugins/clangformat/clangformatglobalconfigwidget.cpp
+++ b/src/plugins/clangformat/clangformatglobalconfigwidget.cpp
@@ -156,9 +156,20 @@ void ClangFormatGlobalConfigWidget::initOverrideCheckBox()
                                                 "can be overridden by the settings below."));
     }
 
-    auto setEnableOverrideCheckBox = [this](int index) {
+    auto setTemporarilyReadOnly = [this]() {
+        if (m_ignoreChanges.isLocked())
+            return;
+        Utils::GuardLocker locker(m_ignoreChanges);
+        m_codeStyle->currentPreferences()->setTemporarilyReadOnly(!m_overrideDefault->isChecked());
+        m_codeStyle->currentPreferences()->setIsAdditionalTabDisabled(!m_overrideDefault->isEnabled());
+        ClangFormatSettings::instance().write();
+        emit m_codeStyle->currentPreferencesChanged(m_codeStyle->currentPreferences());
+    };
+
+    auto setEnableOverrideCheckBox = [this, setTemporarilyReadOnly](int index) {
         bool isDisable = index == static_cast<int>(ClangFormatSettings::Mode::Disable);
         m_overrideDefault->setDisabled(isDisable);
+        setTemporarilyReadOnly();
     };
 
     setEnableOverrideCheckBox(m_indentingOrFormatting->currentIndex());
@@ -176,20 +187,19 @@ void ClangFormatGlobalConfigWidget::initOverrideCheckBox()
         ".clang-format file."));
 
     m_overrideDefault->setChecked(getProjectOverriddenSettings(m_project));
-    m_codeStyle->currentPreferences()->setTemporarilyReadOnly(!m_overrideDefault->isChecked());
+    setTemporarilyReadOnly();
 
-    connect(m_overrideDefault, &QCheckBox::toggled, this, [this](bool checked) {
+    connect(m_overrideDefault, &QCheckBox::toggled, this, [this, setTemporarilyReadOnly](bool checked) {
         if (m_project)
             m_project->setNamedSettings(Constants::OVERRIDE_FILE_ID, checked);
-        else {
-            m_codeStyle->currentPreferences()->setTemporarilyReadOnly(!checked);
-            emit m_codeStyle->currentPreferencesChanged(m_codeStyle->currentPreferences());
-        }
+        else
+            setTemporarilyReadOnly();
     });
 
-    connect(m_codeStyle, &TextEditor::ICodeStylePreferences::currentPreferencesChanged, this, [this] {
-        m_codeStyle->currentPreferences()->setTemporarilyReadOnly(!m_overrideDefault->isChecked());
-    });
+    connect(m_codeStyle,
+            &TextEditor::ICodeStylePreferences::currentPreferencesChanged,
+            this,
+            setTemporarilyReadOnly);
 }
 
 
diff --git a/src/plugins/clangformat/clangformatglobalconfigwidget.h b/src/plugins/clangformat/clangformatglobalconfigwidget.h
index 063c82852a3..962a7daaf17 100644
--- a/src/plugins/clangformat/clangformatglobalconfigwidget.h
+++ b/src/plugins/clangformat/clangformatglobalconfigwidget.h
@@ -5,6 +5,8 @@
 
 #include <cppeditor/cppcodestylesettingspage.h>
 
+#include <utils/guard.h>
+
 #include <memory>
 
 QT_BEGIN_NAMESPACE
@@ -40,6 +42,7 @@ private:
 
     ProjectExplorer::Project *m_project;
     TextEditor::ICodeStylePreferences *m_codeStyle;
+    Utils::Guard m_ignoreChanges;
 
     QLabel *m_projectHasClangFormat;
     QLabel *m_formattingModeLabel;
diff --git a/src/plugins/clangformat/clangformatutils.cpp b/src/plugins/clangformat/clangformatutils.cpp
index 3ae9301433e..ed138b13aa9 100644
--- a/src/plugins/clangformat/clangformatutils.cpp
+++ b/src/plugins/clangformat/clangformatutils.cpp
@@ -213,10 +213,14 @@ bool getCurrentOverriddenSettings(const Utils::FilePath &filePath)
     const ProjectExplorer::Project *project = ProjectExplorer::ProjectManager::projectForFile(
         filePath);
 
-    return getProjectUseGlobalSettings(project) ? !TextEditor::TextEditorSettings::codeStyle("Cpp")
-                                                       ->currentPreferences()
-                                                       ->isTemporarilyReadOnly()
-                                                : getProjectOverriddenSettings(project);
+    return getProjectUseGlobalSettings(project)
+               ? !TextEditor::TextEditorSettings::codeStyle("Cpp")
+                         ->currentPreferences()
+                         ->isTemporarilyReadOnly()
+                     && !TextEditor::TextEditorSettings::codeStyle("Cpp")
+                             ->currentPreferences()
+                             ->isAdditionalTabDisabled()
+               : getProjectOverriddenSettings(project);
 }
 
 ClangFormatSettings::Mode getProjectIndentationOrFormattingSettings(
diff --git a/src/plugins/cmakeprojectmanager/cmaketool.h b/src/plugins/cmakeprojectmanager/cmaketool.h
index 9d704b57248..31b9e016276 100644
--- a/src/plugins/cmakeprojectmanager/cmaketool.h
+++ b/src/plugins/cmakeprojectmanager/cmaketool.h
@@ -61,6 +61,8 @@ public:
     Utils::Id id() const { return m_id; }
     QVariantMap toMap () const;
 
+    void setAutorun(bool autoRun) { m_isAutoRun = autoRun; }
+
     void setFilePath(const Utils::FilePath &executable);
     Utils::FilePath filePath() const;
     Utils::FilePath cmakeExecutable() const;
diff --git a/src/plugins/cmakeprojectmanager/cmaketoolmanager.cpp b/src/plugins/cmakeprojectmanager/cmaketoolmanager.cpp
index 8bc396ced1a..7e4c777317d 100644
--- a/src/plugins/cmakeprojectmanager/cmaketoolmanager.cpp
+++ b/src/plugins/cmakeprojectmanager/cmaketoolmanager.cpp
@@ -141,6 +141,7 @@ void CMakeToolManager::restoreCMakeTools()
     emit m_instance->cmakeToolsLoaded();
 
     // Store the default CMake tool "Autorun CMake" value globally
+    // TODO: Remove in Qt Creator 13
     auto settings = Internal::CMakeSpecificSettings::instance();
     if (settings->autorunCMake.value() == settings->autorunCMake.defaultValue()) {
         CMakeTool *cmake = defaultCMakeTool();
diff --git a/src/plugins/cmakeprojectmanager/cmaketoolsettingsaccessor.cpp b/src/plugins/cmakeprojectmanager/cmaketoolsettingsaccessor.cpp
index 614183352c3..3b1c2e4546e 100644
--- a/src/plugins/cmakeprojectmanager/cmaketoolsettingsaccessor.cpp
+++ b/src/plugins/cmakeprojectmanager/cmaketoolsettingsaccessor.cpp
@@ -4,6 +4,7 @@
 #include "cmaketoolsettingsaccessor.h"
 
 #include "cmakeprojectmanagertr.h"
+#include "cmakespecificsettings.h"
 #include "cmaketool.h"
 
 #include <coreplugin/icore.h>
@@ -184,9 +185,14 @@ void CMakeToolSettingsAccessor::saveCMakeTools(const QList<CMakeTool *> &cmakeTo
     data.insert(QLatin1String(CMAKE_TOOL_DEFAULT_KEY), defaultId.toSetting());
 
     int count = 0;
-    for (const CMakeTool *item : cmakeTools) {
+    for (CMakeTool *item : cmakeTools) {
         Utils::FilePath fi = item->cmakeExecutable();
 
+        // Gobal Autorun value will be set for all tools
+        // TODO: Remove in Qt Creator 13
+        const auto settings = CMakeSpecificSettings::instance();
+        item->setAutorun(settings->autorunCMake.value());
+
         if (fi.needsDevice() || fi.isExecutableFile()) { // be graceful for device related stuff
             QVariantMap tmp = item->toMap();
             if (tmp.isEmpty())
diff --git a/src/plugins/cppeditor/cppcodestylesettingspage.cpp b/src/plugins/cppeditor/cppcodestylesettingspage.cpp
index b9cdbc47f39..84573bdeed5 100644
--- a/src/plugins/cppeditor/cppcodestylesettingspage.cpp
+++ b/src/plugins/cppeditor/cppcodestylesettingspage.cpp
@@ -426,7 +426,8 @@ void CppCodeStylePreferencesWidget::setCodeStyleSettings(const CppCodeStyleSetti
 
 void CppCodeStylePreferencesWidget::slotCurrentPreferencesChanged(ICodeStylePreferences *preferences, bool preview)
 {
-    const bool enable = !preferences->isReadOnly() && !preferences->isTemporarilyReadOnly();
+    const bool enable = !preferences->isReadOnly() && (!preferences->isTemporarilyReadOnly()
+                                                       || preferences->isAdditionalTabDisabled());
     for (QWidget *widget : d->m_controllers)
         widget->setEnabled(enable);
 
diff --git a/src/plugins/cppeditor/cppquickfixes.cpp b/src/plugins/cppeditor/cppquickfixes.cpp
index 4c37e75934a..60d799cb5f4 100644
--- a/src/plugins/cppeditor/cppquickfixes.cpp
+++ b/src/plugins/cppeditor/cppquickfixes.cpp
@@ -3827,6 +3827,7 @@ public:
         GenerateProperty = 1 << 5,
         GenerateConstantProperty = 1 << 6,
         HaveExistingQProperty = 1 << 7,
+        Invalid = -1,
     };
 
     GenerateGetterSetterOp(const CppQuickFixInterface &interface,
@@ -4524,7 +4525,7 @@ public:
     };
     using Flag = GenerateGetterSetterOp::GenerateFlag;
     constexpr static Flag ColumnFlag[] = {
-        static_cast<Flag>(-1),
+        Flag::Invalid,
         Flag::GenerateGetter,
         Flag::GenerateSetter,
         Flag::GenerateSignal,
diff --git a/src/plugins/debugger/debuggertooltipmanager.cpp b/src/plugins/debugger/debuggertooltipmanager.cpp
index 40f12f5470a..21ed34d5496 100644
--- a/src/plugins/debugger/debuggertooltipmanager.cpp
+++ b/src/plugins/debugger/debuggertooltipmanager.cpp
@@ -266,9 +266,20 @@ public:
 
     void expandNode(const QModelIndex &idx)
     {
+        if (!m_engine)
+            return;
+
         m_expandedINames.insert(idx.data(LocalsINameRole).toString());
-        if (canFetchMore(idx))
-            fetchMore(idx);
+        if (canFetchMore(idx)) {
+            if (!idx.isValid())
+                return;
+
+            if (auto item = dynamic_cast<ToolTipWatchItem *>(itemForIndex(idx))) {
+                WatchItem *it = m_engine->watchHandler()->findItem(item->iname);
+                if (QTC_GUARD(it))
+                    it->model()->fetchMore(it->index());
+            }
+        }
     }
 
     void collapseNode(const QModelIndex &idx)
@@ -276,22 +287,6 @@ public:
         m_expandedINames.remove(idx.data(LocalsINameRole).toString());
     }
 
-    void fetchMore(const QModelIndex &idx) override
-    {
-        if (!idx.isValid())
-            return;
-        auto item = dynamic_cast<ToolTipWatchItem *>(itemForIndex(idx));
-        if (!item)
-            return;
-        QString iname = item->iname;
-        if (!m_engine)
-            return;
-
-        WatchItem *it = m_engine->watchHandler()->findItem(iname);
-        QTC_ASSERT(it, return);
-        it->model()->fetchMore(it->index());
-    }
-
     void restoreTreeModel(QXmlStreamReader &r);
 
     QPointer<DebuggerEngine> m_engine;
diff --git a/src/plugins/debugger/terminal.cpp b/src/plugins/debugger/terminal.cpp
index cc309541a81..ac8a043df86 100644
--- a/src/plugins/debugger/terminal.cpp
+++ b/src/plugins/debugger/terminal.cpp
@@ -38,12 +38,6 @@ using namespace Utils;
 
 namespace Debugger::Internal {
 
-static QString currentError()
-{
-    int err = errno;
-    return QString::fromLatin1(strerror(err));
-}
-
 Terminal::Terminal(QObject *parent)
    : QObject(parent)
 {
@@ -52,6 +46,10 @@ Terminal::Terminal(QObject *parent)
 void Terminal::setup()
 {
 #ifdef DEBUGGER_USE_TERMINAL
+    const auto currentError = [] {
+        int err = errno;
+        return QString::fromLatin1(strerror(err));
+    };
     if (!qtcEnvironmentVariableIsSet("QTC_USE_PTY"))
         return;
 
diff --git a/src/plugins/texteditor/icodestylepreferences.cpp b/src/plugins/texteditor/icodestylepreferences.cpp
index 931714b71c5..29a524ebf68 100644
--- a/src/plugins/texteditor/icodestylepreferences.cpp
+++ b/src/plugins/texteditor/icodestylepreferences.cpp
@@ -25,6 +25,7 @@ public:
     QString m_displayName;
     bool m_readOnly = false;
     bool m_temporarilyReadOnly = false;
+    bool m_isAdditionalTabDisabled = false;
     QString m_settingsSuffix;
 };
 
@@ -82,6 +83,16 @@ bool ICodeStylePreferences::isTemporarilyReadOnly() const
     return d->m_temporarilyReadOnly;
 }
 
+bool ICodeStylePreferences::isAdditionalTabDisabled() const
+{
+    return d->m_isAdditionalTabDisabled;
+}
+
+void ICodeStylePreferences::setIsAdditionalTabDisabled(bool on)
+{
+    d->m_isAdditionalTabDisabled = on;
+}
+
 void ICodeStylePreferences::setTabSettings(const TabSettings &settings)
 {
     if (d->m_tabSettings == settings)
diff --git a/src/plugins/texteditor/icodestylepreferences.h b/src/plugins/texteditor/icodestylepreferences.h
index 1c363903445..7fd616d5604 100644
--- a/src/plugins/texteditor/icodestylepreferences.h
+++ b/src/plugins/texteditor/icodestylepreferences.h
@@ -40,6 +40,9 @@ public:
     bool isTemporarilyReadOnly() const;
     void setTemporarilyReadOnly(bool on);
 
+    bool isAdditionalTabDisabled() const;
+    void setIsAdditionalTabDisabled(bool on);
+
     void setTabSettings(const TabSettings &settings);
     TabSettings tabSettings() const;
     TabSettings currentTabSettings() const;
diff --git a/tests/system/shared/project.py b/tests/system/shared/project.py
index 7b58b95c9f6..d05a3b37a8e 100644
--- a/tests/system/shared/project.py
+++ b/tests/system/shared/project.py
@@ -131,7 +131,7 @@ def __createProjectHandleQtQuickSelection__(minimumQtVersion):
         selectFromCombo(comboBox, minimumQtVersion)
     except:
         t,v = sys.exc_info()[:2]
-        test.fatal("Exception while trying to select Qt version", "%s :%s" % (t.__name__, str(v)))
+        test.fatal("Exception while trying to select Qt version", "%s: %s" % (t.__name__, str(v)))
     clickButton(waitForObject(":Next_QPushButton"))
     return minimumQtVersion
 
diff --git a/tests/system/shared/qtcreator.py b/tests/system/shared/qtcreator.py
index 543c3c7ad4f..d49b23350d7 100644
--- a/tests/system/shared/qtcreator.py
+++ b/tests/system/shared/qtcreator.py
@@ -12,10 +12,10 @@ import subprocess;
 import sys
 import errno;
 from datetime import datetime,timedelta;
-try:
-    import __builtin__                  # Python 2
-except ImportError:
-    import builtins as __builtin__      # Python 3
+if sys.version_info.major > 2:
+    import builtins as __builtin__
+else:
+    import __builtin__
 
 
 srcPath = ''
@@ -382,6 +382,7 @@ def copySettingsToTmpDir(destination=None, omitFiles=[]):
     substituteUnchosenTargetABIs(tmpSettingsDir)
     SettingsPath = ['-settingspath', '"%s"' % tmpSettingsDir]
 
+test.log("Test is running on Python %s" % sys.version)
 # current dir is directory holding qtcreator.py
 origSettingsDir = os.path.abspath(os.path.join(os.getcwd(), "..", "..", "settings"))
 
diff --git a/tests/system/suite_HELP/tst_HELP02/test.py b/tests/system/suite_HELP/tst_HELP02/test.py
index 3601c81a37b..7cacdf6e515 100644
--- a/tests/system/suite_HELP/tst_HELP02/test.py
+++ b/tests/system/suite_HELP/tst_HELP02/test.py
@@ -36,7 +36,7 @@ def checkQtCreatorHelpVersion(expectedVersion):
         helpContentWidget = waitForObject(':Qt Creator_QHelpContentWidget', 5000)
         waitFor("any(map(rightStart, dumpItems(helpContentWidget.model())))", 10000)
         items = dumpItems(helpContentWidget.model())
-        test.compare(filter(rightStart, items)[0],
+        test.compare(list(filter(rightStart, items))[0],
                      'Qt Creator Manual %s' % expectedVersion,
                      'Verifying whether manual uses expected version.')
     except: