diff --git a/src/libs/languageserverprotocol/languagefeatures.cpp b/src/libs/languageserverprotocol/languagefeatures.cpp
index 6672bbc2b87..06793217f14 100644
--- a/src/libs/languageserverprotocol/languagefeatures.cpp
+++ b/src/libs/languageserverprotocol/languagefeatures.cpp
@@ -396,7 +396,7 @@ CodeActionResult::CodeActionResult(const QJsonValue &val)
 {
     using ResultArray = QList<Utils::variant<Command, CodeAction>>;
     if (val.isArray()) {
-        QJsonArray array = val.toArray();
+        const QJsonArray array = val.toArray();
         ResultArray result;
         for (const QJsonValue &val : array) {
             Command command(val);
diff --git a/src/libs/qmljs/qmljsplugindumper.cpp b/src/libs/qmljs/qmljsplugindumper.cpp
index fbfe22174ef..aeef89372fc 100644
--- a/src/libs/qmljs/qmljsplugindumper.cpp
+++ b/src/libs/qmljs/qmljsplugindumper.cpp
@@ -482,7 +482,7 @@ void PluginDumper::runQmlDump(const QmlJS::ModelManagerInterface::ProjectInfo &i
     process->setEnvironment(info.qmlDumpEnvironment.toStringList());
     QString workingDir = wd.canonicalPath();
     process->setWorkingDirectory(workingDir);
-    connect(process, static_cast<void (QProcess::*)(int)>(&QProcess::finished),
+    connect(process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
             this, &PluginDumper::qmlPluginTypeDumpDone);
     connect(process, &QProcess::errorOccurred, this, &PluginDumper::qmlPluginTypeDumpError);
     process->start(info.qmlDumpPath, arguments);
diff --git a/src/libs/ssh/sftpsession.cpp b/src/libs/ssh/sftpsession.cpp
index 91379324aab..0119bea2660 100644
--- a/src/libs/ssh/sftpsession.cpp
+++ b/src/libs/ssh/sftpsession.cpp
@@ -119,7 +119,7 @@ SftpSession::SftpSession(const QStringList &connectionArgs) : d(new SftpSessionP
             emit done(tr("sftp failed to start: %1").arg(d->sftpProc.errorString()));
         }
     });
-    connect(&d->sftpProc, static_cast<void (QProcess::*)(int)>(&QProcess::finished), [this] {
+    connect(&d->sftpProc, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), [this] {
         d->state = State::Inactive;
         if (d->sftpProc.exitStatus() != QProcess::NormalExit) {
             emit done(tr("sftp crashed."));
diff --git a/src/libs/ssh/sftptransfer.cpp b/src/libs/ssh/sftptransfer.cpp
index 4ba823a6eb4..57674cc94dd 100644
--- a/src/libs/ssh/sftptransfer.cpp
+++ b/src/libs/ssh/sftptransfer.cpp
@@ -114,7 +114,7 @@ SftpTransfer::SftpTransfer(const FilesToTransfer &files, Internal::FileTransferT
         if (error == QProcess::FailedToStart)
             emitError(tr("sftp failed to start: %1").arg(d->sftpProc.errorString()));
     });
-    connect(&d->sftpProc, static_cast<void (QProcess::*)(int)>(&QProcess::finished), [this] {
+    connect(&d->sftpProc, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), [this] {
         if (d->sftpProc.exitStatus() != QProcess::NormalExit) {
             emitError(tr("sftp crashed."));
             return;
diff --git a/src/libs/ssh/sshconnection.cpp b/src/libs/ssh/sshconnection.cpp
index 52db107dc93..fe207235ecd 100644
--- a/src/libs/ssh/sshconnection.cpp
+++ b/src/libs/ssh/sshconnection.cpp
@@ -202,7 +202,7 @@ SshConnection::SshConnection(const SshConnectionParameters &serverInfo, QObject
             break; // Cannot happen.
         }
     });
-    connect(&d->masterProcess, static_cast<void (QProcess::*)(int)>(&QProcess::finished), [this] {
+    connect(&d->masterProcess, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), [this] {
         if (d->state == Disconnecting) {
             emitDisconnected();
             return;
diff --git a/src/libs/utils/crumblepath.cpp b/src/libs/utils/crumblepath.cpp
index ad8c81ef0a2..f8f027d7f70 100644
--- a/src/libs/utils/crumblepath.cpp
+++ b/src/libs/utils/crumblepath.cpp
@@ -93,7 +93,7 @@ static QPixmap segmentPixmap(CrumblePathButton::SegmentType type, QStyle::State
     const QString pixmapKey = QStringLiteral("crumblePath-segment-%1-iconMode-%2-hover-%3")
             .arg(segmentName).arg(iconMode).arg(hover);
     QPixmap pixmap;
-    if (!QPixmapCache::find(pixmapKey, pixmap)) {
+    if (!QPixmapCache::find(pixmapKey, &pixmap)) {
         const QString maskFileName = QStringLiteral(":/utils/images/crumblepath-segment-%1%2.png")
                 .arg(segmentName).arg(QLatin1String(hover ? "-hover" : ""));
         pixmap = Icon({{maskFileName, Theme::IconsBaseColor}}).pixmap(iconMode);
diff --git a/src/libs/utils/fileutils.cpp b/src/libs/utils/fileutils.cpp
index 5d20b7b8cc1..708595aa4d8 100644
--- a/src/libs/utils/fileutils.cpp
+++ b/src/libs/utils/fileutils.cpp
@@ -82,7 +82,7 @@ bool FileUtils::removeRecursively(const FileName &filePath, QString *error)
     QFile::setPermissions(filePath.toString(), fileInfo.permissions() | QFile::WriteUser);
     if (fileInfo.isDir()) {
         QDir dir(filePath.toString());
-        dir = dir.canonicalPath();
+        dir.setPath(dir.canonicalPath());
         if (dir.isRoot()) {
             if (error) {
                 *error = QCoreApplication::translate("Utils::FileUtils",
diff --git a/src/libs/utils/qtcolorbutton.cpp b/src/libs/utils/qtcolorbutton.cpp
index 5463f96ddab..4acac27ea84 100644
--- a/src/libs/utils/qtcolorbutton.cpp
+++ b/src/libs/utils/qtcolorbutton.cpp
@@ -58,19 +58,11 @@ public:
 
 void QtColorButtonPrivate::slotEditColor()
 {
-    QColor newColor;
-    if (m_alphaAllowed) {
-        bool ok;
-        const QRgb rgba = QColorDialog::getRgba(m_color.rgba(), &ok, q_ptr);
-        if (!ok)
-            return;
-        newColor = QColor::fromRgba(rgba);
-    } else {
-        newColor = QColorDialog::getColor(m_color, q_ptr);
-        if (!newColor.isValid())
-            return;
-    }
-    if (newColor == q_ptr->color())
+    QColorDialog::ColorDialogOptions options;
+    if (m_alphaAllowed)
+        options |= QColorDialog::ShowAlphaChannel;
+    const QColor newColor = QColorDialog::getColor(m_color, q_ptr, QString(), options);
+    if (!newColor.isValid() || newColor == q_ptr->color())
         return;
     q_ptr->setColor(newColor);
     emit q_ptr->colorChanged(m_color);
@@ -243,7 +235,7 @@ void QtColorButton::mouseMoveEvent(QMouseEvent *event)
         drg->setPixmap(d_ptr->generatePixmap());
         setDown(false);
         event->accept();
-        drg->start();
+        drg->exec(Qt::CopyAction);
         return;
     }
 #endif
diff --git a/src/libs/utils/stylehelper.cpp b/src/libs/utils/stylehelper.cpp
index 628e062b3e1..e44037f5a1a 100644
--- a/src/libs/utils/stylehelper.cpp
+++ b/src/libs/utils/stylehelper.cpp
@@ -216,7 +216,7 @@ void StyleHelper::verticalGradient(QPainter *painter, const QRect &spanRect, con
             clipRect.height(), keyColor.rgb());
 
         QPixmap pixmap;
-        if (!QPixmapCache::find(key, pixmap)) {
+        if (!QPixmapCache::find(key, &pixmap)) {
             pixmap = QPixmap(clipRect.size());
             QPainter p(&pixmap);
             QRect rect(0, 0, clipRect.width(), clipRect.height());
@@ -274,7 +274,7 @@ void StyleHelper::horizontalGradient(QPainter *painter, const QRect &spanRect, c
             clipRect.height(), keyColor.rgb(), spanRect.x());
 
         QPixmap pixmap;
-        if (!QPixmapCache::find(key, pixmap)) {
+        if (!QPixmapCache::find(key, &pixmap)) {
             pixmap = QPixmap(clipRect.size());
             QPainter p(&pixmap);
             QRect rect = QRect(0, 0, clipRect.width(), clipRect.height());
@@ -312,7 +312,7 @@ void StyleHelper::drawArrow(QStyle::PrimitiveElement element, QPainter *painter,
     QString pixmapName;
     pixmapName.sprintf("StyleHelper::drawArrow-%d-%d-%d-%f",
                        element, size, enabled, devicePixelRatio);
-    if (!QPixmapCache::find(pixmapName, pixmap)) {
+    if (!QPixmapCache::find(pixmapName, &pixmap)) {
         QImage image(size * devicePixelRatio, size * devicePixelRatio, QImage::Format_ARGB32_Premultiplied);
         image.fill(Qt::transparent);
         QPainter painter(&image);
@@ -357,7 +357,7 @@ void StyleHelper::menuGradient(QPainter *painter, const QRect &spanRect, const Q
             clipRect.height(), StyleHelper::baseColor().rgb());
 
         QPixmap pixmap;
-        if (!QPixmapCache::find(key, pixmap)) {
+        if (!QPixmapCache::find(key, &pixmap)) {
             pixmap = QPixmap(clipRect.size());
             QPainter p(&pixmap);
             QRect rect = QRect(0, 0, clipRect.width(), clipRect.height());
@@ -396,7 +396,7 @@ void StyleHelper::drawIconWithShadow(const QIcon &icon, const QRect &rect,
     QString pixmapName = QString::fromLatin1("icon %0 %1 %2 %3")
             .arg(icon.cacheKey()).arg(iconMode).arg(rect.height()).arg(devicePixelRatio);
 
-    if (!QPixmapCache::find(pixmapName, cache)) {
+    if (!QPixmapCache::find(pixmapName, &cache)) {
         // High-dpi support: The in parameters (rect, radius, offset) are in
         // device-independent pixels. The call to QIcon::pixmap() below might
         // return a high-dpi pixmap, which will in that case have a devicePixelRatio
diff --git a/src/plugins/bookmarks/bookmarkmanager.cpp b/src/plugins/bookmarks/bookmarkmanager.cpp
index 76e31efeefd..c3b061a05b7 100644
--- a/src/plugins/bookmarks/bookmarkmanager.cpp
+++ b/src/plugins/bookmarks/bookmarkmanager.cpp
@@ -132,8 +132,8 @@ void BookmarkDelegate::paint(QPainter *painter, const QStyleOptionViewItem &opti
         if (!m_selectedPixmap)
             generateGradientPixmap(lwidth, fm.height()+1, backgroundColor, selected);
     } else {
-        painter->setBrush(opt.palette.background().color());
-        backgroundColor = opt.palette.background().color();
+        backgroundColor = opt.palette.window().color();
+        painter->setBrush(backgroundColor);
         if (!m_normalPixmap)
             generateGradientPixmap(lwidth, fm.height(), backgroundColor, selected);
     }
diff --git a/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp b/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp
index 5f85a2e2263..4811e1b5431 100644
--- a/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp
+++ b/src/plugins/clangcodemodel/clangdiagnostictooltipwidget.cpp
@@ -40,6 +40,7 @@
 #include <QFileInfo>
 #include <QHash>
 #include <QLabel>
+#include <QScreen>
 #include <QTextDocument>
 #include <QUrl>
 
@@ -385,7 +386,10 @@ private:
 
     static int widthLimit()
     {
-        return QApplication::desktop()->availableGeometry(QCursor::pos()).width() / 2;
+        auto screen = QGuiApplication::screenAt(QCursor::pos());
+        if (!screen)
+            screen = QGuiApplication::primaryScreen();
+        return screen->availableGeometry().width() / 2;
     }
 
 private:
diff --git a/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp b/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp
index af23aaf688b..62f7030c6d8 100644
--- a/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp
+++ b/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp
@@ -27,33 +27,30 @@
 #include "ui_externaltoolconfig.h"
 
 #include <utils/algorithm.h>
+#include <utils/environment.h>
+#include <utils/environmentdialog.h>
+#include <utils/fancylineedit.h>
 #include <utils/hostosinfo.h>
 #include <utils/macroexpander.h>
 #include <utils/qtcassert.h>
 #include <utils/qtcprocess.h>
-#include <utils/fancylineedit.h>
-#include <utils/environment.h>
-#include <utils/environmentdialog.h>
 
 #include <coreplugin/coreconstants.h>
 #include <coreplugin/variablechooser.h>
 
 #include <QDialogButtonBox>
-#include <QTextStream>
-#include <QMimeData>
 #include <QMenu>
+#include <QMimeData>
 #include <QPlainTextEdit>
+#include <QTextStream>
 
 using namespace Core;
 using namespace Core::Internal;
 
-
 static const Qt::ItemFlags TOOLSMENU_ITEM_FLAGS = Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsDropEnabled;
 static const Qt::ItemFlags CATEGORY_ITEM_FLAGS = Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsDropEnabled | Qt::ItemIsEditable;
 static const Qt::ItemFlags TOOL_ITEM_FLAGS = Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsDragEnabled | Qt::ItemIsEditable;
 
-// #pragma mark -- ExternalToolModel
-
 ExternalToolModel::ExternalToolModel(QObject *parent)
     : QAbstractItemModel(parent)
 {
@@ -133,7 +130,7 @@ QMimeData *ExternalToolModel::mimeData(const QModelIndexList &indexes) const
     QByteArray ba;
     QDataStream stream(&ba, QIODevice::WriteOnly);
     stream << category << m_tools.value(category).indexOf(tool);
-    md->setData(QLatin1String("application/qtcreator-externaltool-config"), ba);
+    md->setData("application/qtcreator-externaltool-config", ba);
     return md;
 }
 
@@ -149,7 +146,7 @@ bool ExternalToolModel::dropMimeData(const QMimeData *data,
     bool found;
     QString toCategory = categoryForIndex(parent, &found);
     QTC_ASSERT(found, return false);
-    QByteArray ba = data->data(QLatin1String("application/qtcreator-externaltool-config"));
+    QByteArray ba = data->data("application/qtcreator-externaltool-config");
     if (ba.isEmpty())
         return false;
     QDataStream stream(&ba, QIODevice::ReadOnly);
@@ -309,7 +306,7 @@ void ExternalToolModel::revertTool(const QModelIndex &modelIndex)
     ExternalTool *tool = toolForIndex(modelIndex);
     QTC_ASSERT(tool, return);
     QTC_ASSERT(tool->preset() && !tool->preset()->fileName().isEmpty(), return);
-    ExternalTool *resetTool = new ExternalTool(tool->preset().data());
+    auto resetTool = new ExternalTool(tool->preset().data());
     resetTool->setPreset(tool->preset());
     (*tool) = (*resetTool);
     delete resetTool;
@@ -350,10 +347,10 @@ QModelIndex ExternalToolModel::addTool(const QModelIndex &atIndex)
     //: Sample external tool text
     const QString text = tr("Useful text");
     if (Utils::HostOsInfo::isWindowsHost()) {
-        tool->setExecutables(QStringList(QLatin1String("cmd")));
-        tool->setArguments(QLatin1String("/c echo ") + text);
+        tool->setExecutables({"cmd"});
+        tool->setArguments("/c echo " + text);
     } else {
-        tool->setExecutables(QStringList(QLatin1String("echo")));
+        tool->setExecutables({"echo"});
         tool->setArguments(text);
     }
 
@@ -395,8 +392,6 @@ void ExternalToolModel::removeTool(const QModelIndex &modelIndex)
     delete tool;
 }
 
-// #pragma mark -- ExternalToolConfig
-
 static void fillBaseEnvironmentComboBox(QComboBox *box)
 {
     box->clear();
@@ -411,6 +406,7 @@ ExternalToolConfig::ExternalToolConfig(QWidget *parent) :
     m_model(new ExternalToolModel(this))
 {
     ui->setupUi(this);
+    ui->executable->setExpectedKind(Utils::PathChooser::ExistingCommand);
     ui->scrollArea->viewport()->setAutoFillBackground(false);
     ui->scrollAreaWidgetContents->setAutoFillBackground(false);
     ui->toolTree->setModel(m_model);
@@ -433,7 +429,8 @@ ExternalToolConfig::ExternalToolConfig(QWidget *parent) :
             this, &ExternalToolConfig::updateCurrentItem);
     connect(ui->executable, &Utils::PathChooser::browsingFinished,
             this, &ExternalToolConfig::updateCurrentItem);
-    connect(ui->arguments, &QLineEdit::editingFinished, this, &ExternalToolConfig::updateCurrentItem);
+    connect(ui->arguments, &QLineEdit::editingFinished,
+            this, &ExternalToolConfig::updateCurrentItem);
     connect(ui->arguments, &QLineEdit::editingFinished,
             this, &ExternalToolConfig::updateEffectiveArguments);
     connect(ui->workingDirectory, &Utils::PathChooser::editingFinished,
@@ -442,28 +439,30 @@ ExternalToolConfig::ExternalToolConfig(QWidget *parent) :
             this, &ExternalToolConfig::updateCurrentItem);
     connect(ui->environmentButton, &QAbstractButton::clicked,
             this, &ExternalToolConfig::editEnvironmentChanges);
-    connect(ui->outputBehavior, static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
+    connect(ui->outputBehavior, QOverload<int>::of(&QComboBox::activated),
             this, &ExternalToolConfig::updateCurrentItem);
-    connect(ui->errorOutputBehavior, static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
+    connect(ui->errorOutputBehavior, QOverload<int>::of(&QComboBox::activated),
             this, &ExternalToolConfig::updateCurrentItem);
     connect(ui->modifiesDocumentCheckbox, &QAbstractButton::clicked,
             this, &ExternalToolConfig::updateCurrentItem);
-    connect(ui->inputText, &QPlainTextEdit::textChanged, this, &ExternalToolConfig::updateCurrentItem);
+    connect(ui->inputText, &QPlainTextEdit::textChanged,
+            this, &ExternalToolConfig::updateCurrentItem);
 
-    connect(ui->revertButton, &QAbstractButton::clicked, this, &ExternalToolConfig::revertCurrentItem);
-    connect(ui->removeButton, &QAbstractButton::clicked, this, &ExternalToolConfig::removeTool);
+    connect(ui->revertButton, &QAbstractButton::clicked,
+            this, &ExternalToolConfig::revertCurrentItem);
+    connect(ui->removeButton, &QAbstractButton::clicked,
+            this, &ExternalToolConfig::removeTool);
 
     auto menu = new QMenu(ui->addButton);
     ui->addButton->setMenu(menu);
-    QAction *addTool = new QAction(tr("Add Tool"), this);
+    auto addTool = new QAction(tr("Add Tool"), this);
     menu->addAction(addTool);
     connect(addTool, &QAction::triggered, this, &ExternalToolConfig::addTool);
-    QAction *addCategory = new QAction(tr("Add Category"), this);
+    auto addCategory = new QAction(tr("Add Category"), this);
     menu->addAction(addCategory);
     connect(addCategory, &QAction::triggered, this, &ExternalToolConfig::addCategory);
 
     showInfoForItem(QModelIndex());
-
 }
 
 ExternalToolConfig::~ExternalToolConfig()
@@ -478,7 +477,7 @@ void ExternalToolConfig::setTools(const QMap<QString, QList<ExternalTool *> > &t
     while (it.hasNext()) {
         it.next();
         QList<ExternalTool *> itemCopy;
-        foreach (ExternalTool *tool, it.value())
+        for (ExternalTool *tool : it.value())
             itemCopy.append(new ExternalTool(tool));
         toolsCopy.insert(it.key(), itemCopy);
     }
@@ -648,7 +647,7 @@ void ExternalToolConfig::editEnvironmentChanges()
 
 void ExternalToolConfig::updateEnvironmentLabel()
 {
-    QString shortSummary = Utils::EnvironmentItem::toStringList(m_environment).join(QLatin1String("; "));
+    QString shortSummary = Utils::EnvironmentItem::toStringList(m_environment).join("; ");
     QFontMetrics fm(ui->environmentLabel->font());
     shortSummary = fm.elidedText(shortSummary, Qt::ElideRight, ui->environmentLabel->width());
     ui->environmentLabel->setText(shortSummary.isEmpty() ? tr("No changes to apply.") : shortSummary);
diff --git a/src/plugins/coreplugin/dialogs/externaltoolconfig.h b/src/plugins/coreplugin/dialogs/externaltoolconfig.h
index 293e9c64d1b..298b70c54fe 100644
--- a/src/plugins/coreplugin/dialogs/externaltoolconfig.h
+++ b/src/plugins/coreplugin/dialogs/externaltoolconfig.h
@@ -27,9 +27,9 @@
 
 #include "../externaltool.h"
 
-#include <QWidget>
 #include <QAbstractItemModel>
 #include <QDialog>
+#include <QWidget>
 
 QT_FORWARD_DECLARE_CLASS(QPlainTextEdit)
 
diff --git a/src/plugins/coreplugin/dialogs/shortcutsettings.cpp b/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
index 16c5676e7e5..191de4a4121 100644
--- a/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
+++ b/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
@@ -552,7 +552,7 @@ bool ShortcutSettingsWidget::markCollisions(ShortcutItem *item)
     }
     item->m_item->setForeground(2, hasCollision
                                 ? Utils::creatorTheme()->color(Utils::Theme::TextColorError)
-                                : commandList()->palette().foreground());
+                                : commandList()->palette().window());
     return hasCollision;
 }
 
diff --git a/src/plugins/coreplugin/helpitem.cpp b/src/plugins/coreplugin/helpitem.cpp
index 268c00ce67b..b8794481cfe 100644
--- a/src/plugins/coreplugin/helpitem.cpp
+++ b/src/plugins/coreplugin/helpitem.cpp
@@ -104,7 +104,7 @@ bool HelpItem::isValid() const
 {
     if (m_helpUrl.isEmpty() && m_helpIds.isEmpty())
         return false;
-    return !links().isEmpty();
+    return !links().empty();
 }
 
 QString HelpItem::extractContent(bool extended) const
@@ -116,7 +116,8 @@ QString HelpItem::extractContent(bool extended) const
         htmlExtractor.setMode(Utils::HtmlDocExtractor::FirstParagraph);
 
     QString contents;
-    for (const QUrl &url : links()) {
+    for (const Link &item : links()) {
+        const QUrl url = item.second;
         const QString html = QString::fromUtf8(Core::HelpManager::fileData(url));
         switch (m_category) {
         case Brief:
@@ -157,50 +158,124 @@ QString HelpItem::extractContent(bool extended) const
     return contents;
 }
 
-const QMap<QString, QUrl> &HelpItem::links() const
+static std::pair<QUrl, int> extractVersion(const QUrl &url)
+{
+    const QString host = url.host();
+    const QStringList hostParts = host.split('.');
+    if (hostParts.size() == 4 && (host.startsWith("com.trolltech.")
+            || host.startsWith("org.qt-project."))) {
+        bool ok = false;
+        // the following is only correct under the specific current conditions, and it will
+        // always be quite some guessing as long as the version information does not
+        // include separators for major vs minor vs patch version
+        const int version = hostParts.at(3).toInt(&ok);
+        if (ok) {
+            QUrl urlWithoutVersion(url);
+            urlWithoutVersion.setHost(hostParts.mid(0, 3).join('.'));
+            return {urlWithoutVersion, version};
+        }
+    }
+    return {url, 0};
+}
+
+// sort primary by "url without version" and seconday by "version"
+static bool helpUrlLessThan(const QUrl &a, const QUrl &b)
+{
+    const std::pair<QUrl, int> va = extractVersion(a);
+    const std::pair<QUrl, int> vb = extractVersion(b);
+    const QString sa = va.first.toString();
+    const QString sb = vb.first.toString();
+    if (sa == sb)
+        return va.second > vb.second;
+    return sa < sb;
+}
+
+static bool linkLessThan(const HelpItem::Link &a, const HelpItem::Link &b)
+{
+    return helpUrlLessThan(a.second, b.second);
+}
+
+// links are sorted with highest "version" first (for Qt help urls)
+const HelpItem::Links &HelpItem::links() const
 {
     if (!m_helpLinks) {
         if (!m_helpUrl.isEmpty()) {
-            m_helpLinks.emplace(QMap<QString, QUrl>({{m_helpUrl.toString(), m_helpUrl}}));
+            m_keyword = m_helpUrl.toString();
+            m_helpLinks.emplace(Links{{m_keyword, m_helpUrl}});
         } else {
             m_helpLinks.emplace(); // set a value even if there are no help IDs
+            QMap<QString, QUrl> helpLinks;
             for (const QString &id : m_helpIds) {
-                m_helpLinks = Core::HelpManager::linksForIdentifier(id);
-                if (!m_helpLinks->isEmpty())
+                helpLinks = Core::HelpManager::linksForIdentifier(id);
+                if (!helpLinks.isEmpty()) {
+                    m_keyword = id;
                     break;
+                }
+            }
+            if (helpLinks.isEmpty()) { // perform keyword lookup as well as a fallback
+                for (const QString &id : m_helpIds) {
+                    helpLinks = Core::HelpManager::linksForKeyword(id);
+                    if (!helpLinks.isEmpty()) {
+                        m_keyword = id;
+                        m_isFuzzyMatch = true;
+                        break;
+                    }
+                }
+            }
+            QMapIterator<QString, QUrl> it(helpLinks);
+            while (it.hasNext()) {
+                it.next();
+                m_helpLinks->emplace_back(it.key(), it.value());
             }
         }
+        Utils::sort(*m_helpLinks, linkLessThan);
     }
     return *m_helpLinks;
 }
 
-static QUrl findBestLink(const QMap<QString, QUrl> &links)
+static const HelpItem::Links getBestLinks(const HelpItem::Links &links)
 {
-    if (links.isEmpty())
-        return QUrl();
-    if (links.size() == 1)
-        return links.first();
-    QUrl source = links.first();
-    // workaround to show the latest Qt version
-    int version = 0;
-    QRegExp exp("(\\d+)");
-    foreach (const QUrl &link, links) {
-        const QString &authority = link.authority();
-        if (authority.startsWith("com.trolltech.")
-                || authority.startsWith("org.qt-project.")) {
-            if (exp.indexIn(authority) >= 0) {
-                const int tmpVersion = exp.cap(1).toInt();
-                if (tmpVersion > version) {
-                    source = link;
-                    version = tmpVersion;
-                }
-            }
+    // extract the highest version (== first) link of each individual topic
+    HelpItem::Links bestLinks;
+    QUrl currentUnversionedUrl;
+    for (const HelpItem::Link &link : links) {
+        const QUrl unversionedUrl = extractVersion(link.second).first;
+        if (unversionedUrl != currentUnversionedUrl) {
+            currentUnversionedUrl = unversionedUrl;
+            bestLinks.push_back(link);
         }
     }
-    return source;
+    return bestLinks;
 }
 
-const QUrl HelpItem::bestLink() const
+static const HelpItem::Links getBestLink(const HelpItem::Links &links)
 {
-    return findBestLink(links());
+    if (links.empty())
+        return {};
+    // Extract single link with highest version, from all topics.
+    // This is to ensure that if we succeeded with an ID lookup, and we have e.g. Qt5 and Qt4
+    // documentation, that we only return the Qt5 link even though the Qt5 and Qt4 URLs look
+    // different.
+    int highestVersion = -1;
+    HelpItem::Link bestLink;
+    for (const HelpItem::Link &link : links) {
+        const int version = extractVersion(link.second).second;
+        if (version > highestVersion) {
+            highestVersion = version;
+            bestLink = link;
+        }
+    }
+    return {bestLink};
+}
+
+const HelpItem::Links HelpItem::bestLinks() const
+{
+    if (m_isFuzzyMatch)
+        return getBestLinks(links());
+    return getBestLink(links());
+}
+
+const QString HelpItem::keyword() const
+{
+    return m_keyword;
 }
diff --git a/src/plugins/coreplugin/helpitem.h b/src/plugins/coreplugin/helpitem.h
index 5468659b2a4..4d9ab153fb8 100644
--- a/src/plugins/coreplugin/helpitem.h
+++ b/src/plugins/coreplugin/helpitem.h
@@ -29,16 +29,20 @@
 
 #include <utils/optional.h>
 
-#include <QMap>
 #include <QString>
 #include <QUrl>
 #include <QVariant>
 
+#include <vector>
+
 namespace Core {
 
 class CORE_EXPORT HelpItem
 {
 public:
+    using Link = std::pair<QString, QUrl>;
+    using Links = std::vector<Link>;
+
     enum Category {
         ClassOrNamespace,
         Enum,
@@ -77,15 +81,18 @@ public:
 
     QString extractContent(bool extended) const;
 
-    const QMap<QString, QUrl> &links() const;
-    const QUrl bestLink() const;
+    const Links &links() const;
+    const Links bestLinks() const;
+    const QString keyword() const;
 
 private:
     QUrl m_helpUrl;
     QStringList m_helpIds;
     QString m_docMark;
     Category m_category = Unknown;
-    mutable Utils::optional<QMap<QString, QUrl>> m_helpLinks; // cached help links
+    mutable Utils::optional<Links> m_helpLinks; // cached help links
+    mutable QString m_keyword;
+    mutable bool m_isFuzzyMatch = false;
 };
 
 } // namespace Core
diff --git a/src/plugins/coreplugin/helpmanager.cpp b/src/plugins/coreplugin/helpmanager.cpp
index 68c976fbfa0..20c6adf83b7 100644
--- a/src/plugins/coreplugin/helpmanager.cpp
+++ b/src/plugins/coreplugin/helpmanager.cpp
@@ -91,6 +91,11 @@ QMap<QString, QUrl> linksForIdentifier(const QString &id)
     return checkInstance() ? m_instance->linksForIdentifier(id) : QMap<QString, QUrl>();
 }
 
+QMap<QString, QUrl> linksForKeyword(const QString &keyword)
+{
+    return checkInstance() ? m_instance->linksForKeyword(keyword) : QMap<QString, QUrl>();
+}
+
 QByteArray fileData(const QUrl &url)
 {
     return checkInstance() ? m_instance->fileData(url) : QByteArray();
diff --git a/src/plugins/coreplugin/helpmanager.h b/src/plugins/coreplugin/helpmanager.h
index 00273365049..4f4484c65db 100644
--- a/src/plugins/coreplugin/helpmanager.h
+++ b/src/plugins/coreplugin/helpmanager.h
@@ -64,6 +64,7 @@ CORE_EXPORT void registerDocumentation(const QStringList &fileNames);
 CORE_EXPORT void unregisterDocumentation(const QStringList &nameSpaces);
 
 CORE_EXPORT QMap<QString, QUrl> linksForIdentifier(const QString &id);
+CORE_EXPORT QMap<QString, QUrl> linksForKeyword(const QString &id);
 CORE_EXPORT QByteArray fileData(const QUrl &url);
 
 CORE_EXPORT void showHelpUrl(const QUrl &url, HelpViewerLocation location = HelpModeAlways);
diff --git a/src/plugins/coreplugin/helpmanager_implementation.h b/src/plugins/coreplugin/helpmanager_implementation.h
index 47afa96f348..6c160c7ce3f 100644
--- a/src/plugins/coreplugin/helpmanager_implementation.h
+++ b/src/plugins/coreplugin/helpmanager_implementation.h
@@ -41,6 +41,7 @@ public:
     virtual void registerDocumentation(const QStringList &fileNames) = 0;
     virtual void unregisterDocumentation(const QStringList &nameSpaces) = 0;
     virtual QMap<QString, QUrl> linksForIdentifier(const QString &id) = 0;
+    virtual QMap<QString, QUrl> linksForKeyword(const QString &keyword) = 0;
     virtual QByteArray fileData(const QUrl &url) = 0;
     virtual void showHelpUrl(const QUrl &url, HelpViewerLocation location = HelpModeAlways) = 0;
 };
diff --git a/src/plugins/cppcheck/cppcheckrunner.cpp b/src/plugins/cppcheck/cppcheckrunner.cpp
index c7472588386..f67044cb678 100644
--- a/src/plugins/cppcheck/cppcheckrunner.cpp
+++ b/src/plugins/cppcheck/cppcheckrunner.cpp
@@ -53,7 +53,7 @@ CppcheckRunner::CppcheckRunner(CppcheckTool &tool) :
             this, &CppcheckRunner::readError);
     connect(m_process, &QProcess::started,
             this, &CppcheckRunner::handleStarted);
-    connect(m_process, QOverload<int>::of(&QProcess::finished),
+    connect(m_process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
             this, &CppcheckRunner::handleFinished);
 
     m_queueTimer.setSingleShot(true);
diff --git a/src/plugins/debugger/cdb/cdbengine.cpp b/src/plugins/debugger/cdb/cdbengine.cpp
index 28fa1bcf9ae..5e62bf5bb6d 100644
--- a/src/plugins/debugger/cdb/cdbengine.cpp
+++ b/src/plugins/debugger/cdb/cdbengine.cpp
@@ -203,7 +203,7 @@ CdbEngine::CdbEngine() :
 
     connect(action(CreateFullBacktrace), &QAction::triggered,
             this, &CdbEngine::createFullBacktrace);
-    connect(&m_process, static_cast<void(QProcess::*)(int)>(&QProcess::finished),
+    connect(&m_process, static_cast<void(QProcess::*)(int, QProcess::ExitStatus)>(&QProcess::finished),
             this, &CdbEngine::processFinished);
     connect(&m_process, &QProcess::errorOccurred, this, &CdbEngine::processError);
     connect(&m_process, &QProcess::readyReadStandardOutput,
diff --git a/src/plugins/debugger/debuggerruncontrol.cpp b/src/plugins/debugger/debuggerruncontrol.cpp
index c08e5ea471e..a664d30c406 100644
--- a/src/plugins/debugger/debuggerruncontrol.cpp
+++ b/src/plugins/debugger/debuggerruncontrol.cpp
@@ -105,7 +105,7 @@ public:
                 this, &LocalProcessRunner::handleStandardOutput);
         connect(&m_proc, &QProcess::readyReadStandardError,
                 this, &LocalProcessRunner::handleStandardError);
-        connect(&m_proc, static_cast<void (QProcess::*)(int)>(&QProcess::finished),
+        connect(&m_proc, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
                 this, &LocalProcessRunner::handleFinished);
     }
 
@@ -213,7 +213,7 @@ private:
         }
 
         m_coreUnpackProcess.setWorkingDirectory(TemporaryDirectory::masterDirectoryPath());
-        connect(&m_coreUnpackProcess, static_cast<void (QProcess::*)(int)>(&QProcess::finished),
+        connect(&m_coreUnpackProcess, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
                 this, &CoreUnpacker::reportStarted);
 
         const QString msg = DebuggerRunTool::tr("Unpacking core file to %1");
diff --git a/src/plugins/debugger/debuggertooltipmanager.cpp b/src/plugins/debugger/debuggertooltipmanager.cpp
index 9aba76fa88f..2f8cef1d243 100644
--- a/src/plugins/debugger/debuggertooltipmanager.cpp
+++ b/src/plugins/debugger/debuggertooltipmanager.cpp
@@ -62,6 +62,7 @@
 #include <QDesktopWidget>
 #include <QFileInfo>
 #include <QLabel>
+#include <QScreen>
 #include <QScrollBar>
 #include <QSortFilterProxyModel>
 #include <QStack>
@@ -624,7 +625,10 @@ void DebuggerToolTipWidget::computeSize()
     // touch the border of the screen.
     QPoint pos(x(), y());
     QTC_ASSERT(QApplication::desktop(), return);
-    QRect desktopRect = QApplication::desktop()->availableGeometry(pos);
+    auto screen = QGuiApplication::screenAt(pos);
+    if (!screen)
+        screen = QGuiApplication::primaryScreen();
+    QRect desktopRect = screen->availableGeometry();
     const int maxWidth = desktopRect.right() - pos.x() - 5 - 5;
     const int maxHeight = desktopRect.bottom() - pos.y() - 5 - 5;
 
diff --git a/src/plugins/debugger/threadshandler.cpp b/src/plugins/debugger/threadshandler.cpp
index 017e1839623..24ec22c693c 100644
--- a/src/plugins/debugger/threadshandler.cpp
+++ b/src/plugins/debugger/threadshandler.cpp
@@ -409,7 +409,7 @@ void ThreadsHandler::setThreads(const GdbMi &data)
     if (!m_currentThread && threads.childCount() > 0)
         m_currentThread = rootItem()->childAt(0);
 
-    if (!m_currentThread) {
+    if (m_currentThread) {
         const QModelIndex currentThreadIndex = m_currentThread->index();
         threadSwitcher()->setCurrentIndex(currentThreadIndex.row());
     }
diff --git a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
index 3e9a72050b3..0975273ee26 100644
--- a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
+++ b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
@@ -396,7 +396,7 @@ void SideDiffEditorWidget::paintSeparator(QPainter &painter,
     if (!foreground.isValid())
         foreground = m_textForeground;
     if (!foreground.isValid())
-        foreground = palette().foreground().color();
+        foreground = palette().windowText().color();
 
     painter.setPen(foreground);
 
diff --git a/src/plugins/git/changeselectiondialog.cpp b/src/plugins/git/changeselectiondialog.cpp
index 5a46b2cbbf8..48f4cf9ccfd 100644
--- a/src/plugins/git/changeselectiondialog.cpp
+++ b/src/plugins/git/changeselectiondialog.cpp
@@ -248,7 +248,7 @@ void ChangeSelectionDialog::recalculateDetails()
     m_process->setWorkingDirectory(workingDir);
     m_process->setProcessEnvironment(m_gitEnvironment);
 
-    connect(m_process, static_cast<void (QProcess::*)(int)>(&QProcess::finished),
+    connect(m_process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
             this, &ChangeSelectionDialog::setDetails);
 
     m_process->start(m_gitExecutable.toString(), {"show", "--decorate", "--stat=80", ref});
diff --git a/src/plugins/git/gitclient.cpp b/src/plugins/git/gitclient.cpp
index 0a55e0b56dc..d28c6bb2630 100644
--- a/src/plugins/git/gitclient.cpp
+++ b/src/plugins/git/gitclient.cpp
@@ -2386,7 +2386,7 @@ bool GitClient::tryLauchingGitK(const QProcessEnvironment &env,
         process->start(binary, arguments);
         success = process->waitForStarted();
         if (success)
-            connect(process, static_cast<void (QProcess::*)(int)>(&QProcess::finished),
+            connect(process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
                     process, &QProcess::deleteLater);
         else
             delete process;
diff --git a/src/plugins/git/mergetool.cpp b/src/plugins/git/mergetool.cpp
index bc42b240472..c1fd1ec2df6 100644
--- a/src/plugins/git/mergetool.cpp
+++ b/src/plugins/git/mergetool.cpp
@@ -65,7 +65,8 @@ bool MergeTool::start(const QString &workingDirectory, const QStringList &files)
     VcsOutputWindow::appendCommand(workingDirectory, binary, arguments);
     m_process->start(binary.toString(), arguments);
     if (m_process->waitForStarted()) {
-        connect(m_process, static_cast<void (QProcess::*)(int)>(&QProcess::finished), this, &MergeTool::done);
+        connect(m_process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
+                this, &MergeTool::done);
         connect(m_process, &QIODevice::readyRead, this, &MergeTool::readData);
     } else {
         delete m_process;
diff --git a/src/plugins/help/helpindexfilter.cpp b/src/plugins/help/helpindexfilter.cpp
index e205359cf4d..42467934b79 100644
--- a/src/plugins/help/helpindexfilter.cpp
+++ b/src/plugins/help/helpindexfilter.cpp
@@ -141,7 +141,7 @@ void HelpIndexFilter::accept(LocatorFilterEntry selection,
     Q_UNUSED(selectionStart)
     Q_UNUSED(selectionLength)
     const QString &key = selection.displayName;
-    const QMap<QString, QUrl> &links = HelpManager::linksForKeyword(key);
+    const QMap<QString, QUrl> &links = HelpManager::instance()->linksForKeyword(key);
     emit linksActivated(links, key);
 }
 
diff --git a/src/plugins/help/helpmanager.h b/src/plugins/help/helpmanager.h
index 825a27d0467..3a65b0f33dc 100644
--- a/src/plugins/help/helpmanager.h
+++ b/src/plugins/help/helpmanager.h
@@ -54,8 +54,8 @@ public:
     static void registerUserDocumentation(const QStringList &filePaths);
     static QSet<QString> userDocumentationPaths();
 
-    static QMap<QString, QUrl> linksForKeyword(const QString &key);
     QMap<QString, QUrl> linksForIdentifier(const QString &id) override;
+    QMap<QString, QUrl> linksForKeyword(const QString &key) override;
 
     static QUrl findFile(const QUrl &url);
     QByteArray fileData(const QUrl &url) override;
diff --git a/src/plugins/help/helpplugin.cpp b/src/plugins/help/helpplugin.cpp
index ada46f3b3ec..7703541670e 100644
--- a/src/plugins/help/helpplugin.cpp
+++ b/src/plugins/help/helpplugin.cpp
@@ -44,6 +44,7 @@
 #include "searchwidget.h"
 #include "searchtaskhandler.h"
 #include "textbrowserhelpviewer.h"
+#include "topicchooser.h"
 
 #ifdef QTC_MAC_NATIVE_HELPVIEWER
 #include "macwebkithelpviewer.h"
@@ -636,8 +637,8 @@ void HelpPluginPrivate::requestContextHelp()
 
 void HelpPluginPrivate::showContextHelp(const HelpItem &contextHelp)
 {
-    const QUrl source = contextHelp.bestLink();
-    if (!source.isValid()) {
+    const HelpItem::Links links = contextHelp.bestLinks();
+    if (links.empty()) {
         // No link found or no context object
         HelpViewer *viewer = showHelpUrl(QUrl(Help::Constants::AboutBlank),
                                          LocalHelpManager::contextHelpOption());
@@ -653,8 +654,19 @@ void HelpPluginPrivate::showContextHelp(const HelpItem &contextHelp)
                                 .arg(contextHelp.helpIds().join(", "))
                                 .arg(HelpPlugin::tr("No documentation available.")));
         }
+    } else if (links.size() == 1) {
+        showHelpUrl(links.front().second, LocalHelpManager::contextHelpOption());
     } else {
-        showHelpUrl(source, LocalHelpManager::contextHelpOption());
+        QMap<QString, QUrl> map;
+        for (const HelpItem::Link &link : links)
+            map.insert(link.first, link.second);
+        auto tc = new TopicChooser(ICore::dialogParent(), contextHelp.keyword(), map);
+        tc->setModal(true);
+        connect(tc, &QDialog::accepted, this, [this, tc] {
+            showHelpUrl(tc->link(), LocalHelpManager::contextHelpOption());
+        });
+        connect(tc, &QDialog::finished, tc, [tc] { tc->deleteLater(); });
+        tc->show();
     }
 }
 
diff --git a/src/plugins/projectexplorer/abi.cpp b/src/plugins/projectexplorer/abi.cpp
index 131fbb33b41..0de4ea655d2 100644
--- a/src/plugins/projectexplorer/abi.cpp
+++ b/src/plugins/projectexplorer/abi.cpp
@@ -112,6 +112,7 @@ static void setupPreregisteredOsFlavors() {
     registerOsFlavor(Abi::WindowsMsvc2013Flavor, "msvc2013", {Abi::OS::WindowsOS});
     registerOsFlavor(Abi::WindowsMsvc2015Flavor, "msvc2015", {Abi::OS::WindowsOS});
     registerOsFlavor(Abi::WindowsMsvc2017Flavor, "msvc2017", {Abi::OS::WindowsOS});
+    registerOsFlavor(Abi::WindowsMsvc2019Flavor, "msvc2019", {Abi::OS::WindowsOS});
     registerOsFlavor(Abi::WindowsMSysFlavor, "msys", {Abi::OS::WindowsOS});
     registerOsFlavor(Abi::WindowsCEFlavor, "ce", {Abi::OS::WindowsOS});
     registerOsFlavor(Abi::VxWorksFlavor, "vxworks", {Abi::OS::VxWorks});
@@ -279,12 +280,15 @@ static QList<Abi> parseCoffHeader(const QByteArray &data)
             flavor = Abi::WindowsMsvc2013Flavor;
             break;
         case 14:
-            flavor = minorLinker >= quint8(10)
-                ? Abi::WindowsMsvc2017Flavor // MSVC2017 RC
-                : Abi::WindowsMsvc2015Flavor;
+            if (minorLinker >= quint8(20))
+                flavor = Abi::WindowsMsvc2019Flavor;
+            else if (minorLinker >= quint8(10))
+                flavor = Abi::WindowsMsvc2017Flavor;
+            else
+                flavor = Abi::WindowsMsvc2015Flavor;
             break;
         case 15:
-            flavor = Abi::WindowsMsvc2017Flavor;
+            flavor = Abi::WindowsMsvc2019Flavor;
             break;
         default: // Keep unknown flavor
             if (minorLinker != 0)
@@ -589,6 +593,13 @@ bool Abi::operator == (const Abi &other) const
             && m_wordWidth == other.m_wordWidth;
 }
 
+static bool compatibleMSVCFlavors(const Abi::OSFlavor &left, const Abi ::OSFlavor &right)
+{
+    // MSVC 2019, 2017 and 2015 are compatible
+    return left >= Abi::WindowsMsvc2015Flavor && left <= Abi::WindowsMsvc2019Flavor
+           && right >= Abi::WindowsMsvc2015Flavor && right <= Abi::WindowsMsvc2019Flavor;
+}
+
 bool Abi::isCompatibleWith(const Abi &other) const
 {
     // Generic match: If stuff is identical or the other side is unknown, then this is a match.
@@ -615,12 +626,9 @@ bool Abi::isCompatibleWith(const Abi &other) const
     if (isCompat && (osFlavor() == AndroidLinuxFlavor || other.osFlavor() == AndroidLinuxFlavor))
         isCompat = (architecture() == other.architecture()) &&  (osFlavor() == other.osFlavor());
 
-    // MSVC2017 is compatible with MSVC2015
-    if (!isCompat
-            && ((osFlavor() == WindowsMsvc2015Flavor && other.osFlavor() == WindowsMsvc2017Flavor)
-                || (osFlavor() == WindowsMsvc2017Flavor && other.osFlavor() == WindowsMsvc2015Flavor))) {
+    if (!isCompat && compatibleMSVCFlavors(osFlavor(), other.osFlavor()))
         isCompat = true;
-    }
+
     return isCompat;
 }
 
@@ -896,6 +904,8 @@ bool Abi::osSupportsFlavor(const Abi::OS &os, const Abi::OSFlavor &flavor)
 
 Abi::OSFlavor Abi::flavorForMsvcVersion(int version)
 {
+    if (version >= 1920)
+        return WindowsMsvc2019Flavor;
     if (version >= 1910)
         return WindowsMsvc2017Flavor;
     switch (version) {
diff --git a/src/plugins/projectexplorer/abi.h b/src/plugins/projectexplorer/abi.h
index 4c31ed99f5d..43243847c87 100644
--- a/src/plugins/projectexplorer/abi.h
+++ b/src/plugins/projectexplorer/abi.h
@@ -89,6 +89,7 @@ public:
         WindowsMsvc2013Flavor,
         WindowsMsvc2015Flavor,
         WindowsMsvc2017Flavor,
+        WindowsMsvc2019Flavor,
         WindowsMSysFlavor,
         WindowsCEFlavor,
 
diff --git a/src/plugins/projectexplorer/buildsteplist.cpp b/src/plugins/projectexplorer/buildsteplist.cpp
index dab8d70311a..2734f4139d7 100644
--- a/src/plugins/projectexplorer/buildsteplist.cpp
+++ b/src/plugins/projectexplorer/buildsteplist.cpp
@@ -185,7 +185,7 @@ bool BuildStepList::removeStep(int position)
 
 void BuildStepList::moveStepUp(int position)
 {
-    m_steps.swap(position - 1, position);
+    m_steps.swapItemsAt(position - 1, position);
     emit stepMoved(position, position - 1);
 }
 
diff --git a/src/plugins/projectexplorer/devicesupport/desktopdeviceprocess.cpp b/src/plugins/projectexplorer/devicesupport/desktopdeviceprocess.cpp
index e87c2ed4f4d..d57b765bb0a 100644
--- a/src/plugins/projectexplorer/devicesupport/desktopdeviceprocess.cpp
+++ b/src/plugins/projectexplorer/devicesupport/desktopdeviceprocess.cpp
@@ -40,7 +40,7 @@ DesktopDeviceProcess::DesktopDeviceProcess(const QSharedPointer<const IDevice> &
     : DeviceProcess(device, parent)
 {
     connect(&m_process, &QProcess::errorOccurred, this, &DeviceProcess::error);
-    connect(&m_process, static_cast<void (QProcess::*)(int)>(&QProcess::finished),
+    connect(&m_process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished),
             this, &DeviceProcess::finished);
     connect(&m_process, &QProcess::readyReadStandardOutput,
             this, &DeviceProcess::readyReadStandardOutput);
diff --git a/src/plugins/projectexplorer/msvctoolchain.cpp b/src/plugins/projectexplorer/msvctoolchain.cpp
index 711cf30accb..8b8c5711428 100644
--- a/src/plugins/projectexplorer/msvctoolchain.cpp
+++ b/src/plugins/projectexplorer/msvctoolchain.cpp
@@ -384,7 +384,9 @@ static Abi findAbiOfMsvc(MsvcToolChain::Type type,
         else if (version == QLatin1String("v7.0A") || version == QLatin1String("v7.1"))
             msvcVersionString = QLatin1String("10.0");
     }
-    if (msvcVersionString.startsWith(QLatin1String("15.")))
+    if (msvcVersionString.startsWith(QLatin1String("16.")))
+        flavor = Abi::WindowsMsvc2019Flavor;
+    else if (msvcVersionString.startsWith(QLatin1String("15.")))
         flavor = Abi::WindowsMsvc2017Flavor;
     else if (msvcVersionString.startsWith(QLatin1String("14.")))
         flavor = Abi::WindowsMsvc2015Flavor;
@@ -955,6 +957,12 @@ Utils::FileNameList MsvcToolChain::suggestedMkspecList() const
                << Utils::FileName::fromLatin1("winrt-x86-msvc2017")
                << Utils::FileName::fromLatin1("winrt-x64-msvc2017");
         break;
+    case Abi::WindowsMsvc2019Flavor:
+        result << Utils::FileName::fromLatin1("win32-msvc2019")
+               << Utils::FileName::fromLatin1("winrt-arm-msvc2019")
+               << Utils::FileName::fromLatin1("winrt-x86-msvc2019")
+               << Utils::FileName::fromLatin1("winrt-x64-msvc2019");
+        break;
     default:
         result.clear();
         break;
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index 47164b48821..7caef6e4b37 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -1176,7 +1176,7 @@ bool ProjectExplorerPlugin::initialize(const QStringList &arguments, QString *er
     mfileContextMenu->addAction(cmd, Constants::G_FILE_OTHER);
 
     // duplicate file action
-    dd->m_duplicateFileAction = new QAction(tr("Duplicate File..."), this);
+    dd->m_duplicateFileAction = new QAction(tr("Duplicate File"), this);
     cmd = ActionManager::registerAction(dd->m_duplicateFileAction, Constants::DUPLICATEFILE,
                        projecTreeContext);
     mfileContextMenu->addAction(cmd, Constants::G_FILE_OTHER);
diff --git a/src/plugins/projectexplorer/taskwindow.cpp b/src/plugins/projectexplorer/taskwindow.cpp
index 9c9ca6e832d..7d8010aa270 100644
--- a/src/plugins/projectexplorer/taskwindow.cpp
+++ b/src/plugins/projectexplorer/taskwindow.cpp
@@ -758,8 +758,8 @@ void TaskDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
         painter->setBrush(opt.palette.highlight().color());
         backgroundColor = opt.palette.highlight().color();
     } else {
-        painter->setBrush(opt.palette.background().color());
-        backgroundColor = opt.palette.background().color();
+        painter->setBrush(opt.palette.window().color());
+        backgroundColor = opt.palette.window().color();
     }
     painter->setPen(Qt::NoPen);
     painter->drawRect(opt.rect);
diff --git a/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.cpp b/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.cpp
index 385fd54b3d0..8ac2a1cd0b5 100644
--- a/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.cpp
+++ b/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.cpp
@@ -105,6 +105,14 @@ void DesktopQmakeRunConfiguration::updateTargetInformation()
     aspect<ExecutableAspect>()->setExecutable(bti.targetFilePath);
 }
 
+bool DesktopQmakeRunConfiguration::fromMap(const QVariantMap &map)
+{
+    if (!RunConfiguration::fromMap(map))
+        return false;
+    updateTargetInformation();
+    return true;
+}
+
 void DesktopQmakeRunConfiguration::doAdditionalSetup(const RunConfigurationCreationInfo &)
 {
     updateTargetInformation();
diff --git a/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.h b/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.h
index ecaa1bfc6b8..2a4ccd564ba 100644
--- a/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.h
+++ b/src/plugins/qmakeprojectmanager/desktopqmakerunconfiguration.h
@@ -43,6 +43,7 @@ public:
 
 private:
     void updateTargetInformation();
+    bool fromMap(const QVariantMap &map) final;
     void doAdditionalSetup(const ProjectExplorer::RunConfigurationCreationInfo &info) final;
 
     QString defaultDisplayName();
diff --git a/src/plugins/qmakeprojectmanager/librarydetailscontroller.cpp b/src/plugins/qmakeprojectmanager/librarydetailscontroller.cpp
index 0f0830b58eb..1d3509f8130 100644
--- a/src/plugins/qmakeprojectmanager/librarydetailscontroller.cpp
+++ b/src/plugins/qmakeprojectmanager/librarydetailscontroller.cpp
@@ -1098,7 +1098,7 @@ QString InternalLibraryDetailsController::snippet() const
     QDir rootBuildDir = rootDir; // If the project is unconfigured use the project dir
     if (ProjectExplorer::Target *t = project->activeTarget())
         if (ProjectExplorer::BuildConfiguration *bc = t->activeBuildConfiguration())
-            rootBuildDir = bc->buildDirectory().toString();
+            rootBuildDir.setPath(bc->buildDirectory().toString());
 
     // the project for which we insert the snippet inside build tree
     QFileInfo pfi(rootBuildDir.filePath(proRelavitePath));
diff --git a/src/plugins/qmljseditor/qmljshoverhandler.cpp b/src/plugins/qmljseditor/qmljshoverhandler.cpp
index 53b3422c80e..6479ba13ad1 100644
--- a/src/plugins/qmljseditor/qmljshoverhandler.cpp
+++ b/src/plugins/qmljseditor/qmljshoverhandler.cpp
@@ -147,7 +147,6 @@ bool QmlJSHoverHandler::setQmlTypeHelp(const ScopeChain &scopeChain, const Docum
 {
     QString moduleName = getModuleName(scopeChain, qmlDocument, value);
 
-    QString helpId;
     QStringList helpIdCandidates;
 
     QStringList helpIdPieces(qName);
@@ -168,7 +167,7 @@ bool QmlJSHoverHandler::setQmlTypeHelp(const ScopeChain &scopeChain, const Docum
     helpIdCandidates += helpIdPieces.join('.');
 
     const HelpItem helpItem(helpIdCandidates, qName.join('.'), HelpItem::QmlComponent);
-    const QMap<QString, QUrl> urlMap = helpItem.links();
+    const HelpItem::Links links = helpItem.links();
 
     // Check if the module name contains a major version.
     QRegularExpression version("^([^\\d]*)(\\d+)\\.*\\d*$");
@@ -176,10 +175,10 @@ bool QmlJSHoverHandler::setQmlTypeHelp(const ScopeChain &scopeChain, const Docum
     if (m.hasMatch()) {
         QMap<QString, QUrl> filteredUrlMap;
         QStringRef maj = m.capturedRef(2);
-        for (auto x = urlMap.begin(); x != urlMap.end(); ++x) {
-            QString urlModuleName = x.value().path().split('/')[1];
+        for (const HelpItem::Link &link : links) {
+            QString urlModuleName = link.second.path().split('/')[1];
             if (urlModuleName.contains(maj))
-                filteredUrlMap.insert(x.key(), x.value());
+                filteredUrlMap.insert(link.first, link.second);
         }
         if (!filteredUrlMap.isEmpty()) {
             // Use the URL, to disambiguate different versions
diff --git a/src/plugins/qtsupport/baseqtversion.cpp b/src/plugins/qtsupport/baseqtversion.cpp
index 9fefd8f28cf..3790005a7c7 100644
--- a/src/plugins/qtsupport/baseqtversion.cpp
+++ b/src/plugins/qtsupport/baseqtversion.cpp
@@ -1634,7 +1634,7 @@ FileName BaseQtVersion::mkspecFromVersionInfo(const QHash<ProKey, ProString> &ve
         }
         if (!qt5) {
             //resolve mkspec link
-            QString rspec = mkspecFullPath.toFileInfo().readLink();
+            QString rspec = mkspecFullPath.toFileInfo().symLinkTarget();
             if (!rspec.isEmpty())
                 mkspecFullPath = FileName::fromUserInput(
                             QDir(baseMkspecDir.toString()).absoluteFilePath(rspec));
@@ -1963,6 +1963,8 @@ static Abi refineAbiFromBuildString(const QByteArray &buildString, const Abi &pr
         flavor = Abi::WindowsMsvc2015Flavor;
     } else if (compiler.startsWith("MSVC 2017") && os == Abi::WindowsOS) {
         flavor = Abi::WindowsMsvc2017Flavor;
+    } else if (compiler.startsWith("MSVC 2019") && os == Abi::WindowsOS) {
+        flavor = Abi::WindowsMsvc2019Flavor;
     }
 
     return Abi(arch, os, flavor, format, wordWidth);
diff --git a/src/plugins/texteditor/codeassist/functionhintproposalwidget.cpp b/src/plugins/texteditor/codeassist/functionhintproposalwidget.cpp
index d673df7e081..4e72e4449bd 100644
--- a/src/plugins/texteditor/codeassist/functionhintproposalwidget.cpp
+++ b/src/plugins/texteditor/codeassist/functionhintproposalwidget.cpp
@@ -40,6 +40,7 @@
 #include <QDesktopWidget>
 #include <QKeyEvent>
 #include <QPointer>
+#include <QScreen>
 
 namespace TextEditor {
 
@@ -366,9 +367,10 @@ void FunctionHintProposalWidget::updateContent()
 void FunctionHintProposalWidget::updatePosition()
 {
     const QDesktopWidget *desktop = QApplication::desktop();
+    const int screenNumber = desktop->screenNumber(d->m_underlyingWidget);
+    auto widgetScreen = QGuiApplication::screens().value(screenNumber, QGuiApplication::primaryScreen());
     const QRect &screen = Utils::HostOsInfo::isMacHost()
-            ? desktop->availableGeometry(desktop->screenNumber(d->m_underlyingWidget))
-            : desktop->screenGeometry(desktop->screenNumber(d->m_underlyingWidget));
+        ? widgetScreen->availableGeometry() : widgetScreen->geometry();
 
     d->m_pager->setFixedWidth(d->m_pager->minimumSizeHint().width());
 
diff --git a/src/plugins/texteditor/fontsettingspage.cpp b/src/plugins/texteditor/fontsettingspage.cpp
index e9c6920b929..1a6235789e2 100644
--- a/src/plugins/texteditor/fontsettingspage.cpp
+++ b/src/plugins/texteditor/fontsettingspage.cpp
@@ -254,16 +254,16 @@ QColor FormatDescription::defaultForeground(TextStyle id)
 {
     if (id == C_LINE_NUMBER) {
         const QPalette palette = Utils::Theme::initialPalette();
-        const QColor bg = palette.background().color();
+        const QColor bg = palette.window().color();
         if (bg.value() < 128)
-            return palette.foreground().color();
+            return palette.windowText().color();
         else
             return palette.dark().color();
     } else if (id == C_CURRENT_LINE_NUMBER) {
         const QPalette palette = Utils::Theme::initialPalette();
-        const QColor bg = palette.background().color();
+        const QColor bg = palette.window().color();
         if (bg.value() < 128)
-            return palette.foreground().color();
+            return palette.windowText().color();
         else
             return QColor();
     } else if (id == C_PARENTHESES) {
@@ -279,7 +279,7 @@ QColor FormatDescription::defaultBackground(TextStyle id)
     if (id == C_TEXT) {
         return Qt::white;
     } else if (id == C_LINE_NUMBER) {
-        return Utils::Theme::initialPalette().background().color();
+        return Utils::Theme::initialPalette().window().color();
     } else if (id == C_SEARCH_RESULT) {
         return QColor(0xffef0b);
     } else if (id == C_PARENTHESES) {
diff --git a/src/plugins/texteditor/texteditor.cpp b/src/plugins/texteditor/texteditor.cpp
index 247fd12352e..6cf1b701366 100644
--- a/src/plugins/texteditor/texteditor.cpp
+++ b/src/plugins/texteditor/texteditor.cpp
@@ -431,7 +431,7 @@ struct PaintEventData
         , searchResultFormat(fontSettings.toTextCharFormat(C_SEARCH_RESULT))
         , visualWhitespaceFormat(fontSettings.toTextCharFormat(C_VISUAL_WHITESPACE))
         , ifdefedOutFormat(fontSettings.toTextCharFormat(C_DISABLED_CODE))
-        , suppressSyntaxInIfdefedOutBlock(ifdefedOutFormat.foreground() != editor->palette().foreground())
+        , suppressSyntaxInIfdefedOutBlock(ifdefedOutFormat.foreground() != editor->palette().windowText())
     { }
     QPointF offset;
     const QRect viewportRect;
@@ -4719,7 +4719,7 @@ void TextEditorWidgetPrivate::paintWidgetBackground(const PaintEventData &data,
             && (q->centerOnScroll() || q->verticalScrollBar()->maximum() == q->verticalScrollBar()->minimum())) {
         const QRect backGroundRect(QPoint(data.eventRect.left(), int(data.offset.y())),
                                    data.eventRect.bottomRight());
-        painter.fillRect(backGroundRect, q->palette().background());
+        painter.fillRect(backGroundRect, q->palette().window());
     }
 }
 
@@ -8236,7 +8236,7 @@ void TextEditorWidgetPrivate::updateTabStops()
     // to be set as an int. A work around is to access directly the QTextOption.
     qreal charWidth = QFontMetricsF(q->font()).width(QLatin1Char(' '));
     QTextOption option = q->document()->defaultTextOption();
-    option.setTabStop(charWidth * m_document->tabSettings().m_tabSize);
+    option.setTabStopDistance(charWidth * m_document->tabSettings().m_tabSize);
     q->document()->setDefaultTextOption(option);
 }
 
diff --git a/src/plugins/valgrind/callgrindvisualisation.cpp b/src/plugins/valgrind/callgrindvisualisation.cpp
index 1f25206377a..b96bdd71b84 100644
--- a/src/plugins/valgrind/callgrindvisualisation.cpp
+++ b/src/plugins/valgrind/callgrindvisualisation.cpp
@@ -346,7 +346,7 @@ void Visualization::setText(const QString &message)
     d->m_scene.clear();
 
     QGraphicsSimpleTextItem *textItem = d->m_scene.addSimpleText(message);
-    textItem->setBrush(palette().foreground());
+    textItem->setBrush(palette().windowText());
     textItem->setPos((d->sceneWidth() - textItem->boundingRect().width()) / 2,
                      (d->sceneHeight() - textItem->boundingRect().height()) / 2);
     textItem->setFlag(QGraphicsItem::ItemIgnoresTransformations);
diff --git a/src/shared/proparser/prowriter.cpp b/src/shared/proparser/prowriter.cpp
index 3ca7220621d..5038d9652ad 100644
--- a/src/shared/proparser/prowriter.cpp
+++ b/src/shared/proparser/prowriter.cpp
@@ -179,7 +179,7 @@ QString ProWriter::compileScope(const QString &scope)
     ProFile *includeFile = parser.parsedProBlock(QStringRef(&scope), 0, QLatin1String("no-file"), 1);
     if (!includeFile)
         return QString();
-    QString result = includeFile->items();
+    const QString result = includeFile->items();
     includeFile->deref();
     return result.mid(2); // chop of TokLine + linenumber
 }
@@ -307,7 +307,7 @@ void ProWriter::putVarValues(ProFile *profile, QStringList *lines, const QString
                              const QString &var, PutFlags flags, const QString &scope,
                              const QString &continuationIndent)
 {
-    QString indent = scope.isEmpty() ? QString() : continuationIndent;
+    const QString indent = scope.isEmpty() ? QString() : continuationIndent;
     const auto effectiveContIndent = [indent, continuationIndent](const ContinuationInfo &ci) {
         return !ci.indent.isEmpty() ? ci.indent : continuationIndent + indent;
     };
@@ -576,8 +576,8 @@ QStringList ProWriter::removeFiles(ProFile *profile, QStringList *lines,
     // maybe those files can be found via $$PWD/relativeToPriFile
 
     valuesToFind.clear();
-    QDir baseDir = QFileInfo(profile->fileName()).absoluteDir();
-    QString prefixPwd = QLatin1String("$$PWD/");
+    const QDir baseDir = QFileInfo(profile->fileName()).absoluteDir();
+    const QString prefixPwd = QLatin1String("$$PWD/");
     foreach (const QString &absoluteFilePath, notYetChanged)
         valuesToFind << (prefixPwd + baseDir.relativeFilePath(absoluteFilePath));
 
diff --git a/tests/system/shared/suites_qtta.py b/tests/system/shared/suites_qtta.py
index d465ea6aa46..79d5ee3edaf 100755
--- a/tests/system/shared/suites_qtta.py
+++ b/tests/system/shared/suites_qtta.py
@@ -55,6 +55,7 @@ def checkSyntaxError(issuesView, expectedTextsArray, warnIfMoreIssues = True):
                     test.warning("Expected error text found, but is not of type: 'error'")
                     return False
                 else:
+                    test.log("Found expected error (%s)" % expectedText)
                     return True
     return False
 
diff --git a/tests/system/suite_CCOM/tst_CCOM02/test.py b/tests/system/suite_CCOM/tst_CCOM02/test.py
index 44e95fa787a..b49594ddfb3 100755
--- a/tests/system/suite_CCOM/tst_CCOM02/test.py
+++ b/tests/system/suite_CCOM/tst_CCOM02/test.py
@@ -54,7 +54,7 @@ def main():
     ensureChecked(waitForObject(":Qt Creator_Issues_Core::Internal::OutputPaneToggleButton"))
     issuesView = waitForObject(":Qt Creator.Issues_QListView")
     # verify that error is properly reported
-    test.verify(checkSyntaxError(issuesView, ["Syntax error"], True),
+    test.verify(checkSyntaxError(issuesView, ["Expected token `:'"], True),
                 "Verifying QML syntax error while parsing complex qt quick application.")
     # exit qt creator
     invokeMenuItem("File", "Exit")
diff --git a/tests/system/suite_WELP/tst_WELP01/test.py b/tests/system/suite_WELP/tst_WELP01/test.py
index ce07f4fdaf3..d20c5d1d912 100755
--- a/tests/system/suite_WELP/tst_WELP01/test.py
+++ b/tests/system/suite_WELP/tst_WELP01/test.py
@@ -41,7 +41,7 @@ def clickItemVerifyHelpCombo(button, expectedHelpComboRegex, testDetails):
                        "Verifying: '%s' button is being displayed." % getStarted)
 def buttonActive(button):
     # colors of the default theme for active button on Welcome page
-    (activeRed, activeGreen, activeBlue) = (64, 66, 68)
+    (activeRed, activeGreen, activeBlue) = (64, 65, 66)
     # QPalette::Window (used background color of Welcome page buttons)
     enumQPaletteWindow = 10
     color = button.palette.color(enumQPaletteWindow)
diff --git a/tests/unit/mockup/projectexplorer/abi.h b/tests/unit/mockup/projectexplorer/abi.h
index 25baca234a6..c742567bdef 100644
--- a/tests/unit/mockup/projectexplorer/abi.h
+++ b/tests/unit/mockup/projectexplorer/abi.h
@@ -49,6 +49,7 @@ public:
         WindowsMsvc2013Flavor,
         WindowsMsvc2015Flavor,
         WindowsMsvc2017Flavor,
+        WindowsMsvc2019Flavor,
         WindowsMSysFlavor,
         WindowsCEFlavor,