Add hotkey for group switching

Ctrl + Shift + Key_PageUp for previous group
Ctrl + Shift + Key_PageDown for next group
Fixes: #4394

src/gui/group/GroupView.cpp

@@ -44,6 +44,8 @@ GroupView::GroupView(Database* db, QWidget* parent)
     // clang-format on
 
     new QShortcut(Qt::CTRL + Qt::Key_F10, this, SLOT(contextMenuShortcutPressed()), nullptr, Qt::WidgetShortcut);
+    new QShortcut(Qt::CTRL + Qt::SHIFT + Qt::Key_PageUp, this, SLOT(prevGroup()), nullptr, Qt::WindowShortcut);
+    new QShortcut(Qt::CTRL + Qt::SHIFT + Qt::Key_PageDown, this, SLOT(nextGroup()), nullptr, Qt::WindowShortcut);
 
     // keyboard shortcuts to sort children of a group
     auto shortcut = new QShortcut(Qt::CTRL + Qt::Key_Down, this);
@@ -60,6 +62,26 @@ GroupView::GroupView(Database* db, QWidget* parent)
     setDefaultDropAction(Qt::MoveAction);
 }
 
+void GroupView::prevGroup()
+{
+    auto prevIndex = indexAbove(currentIndex());
+    if (!prevIndex.isValid())
+        return;
+
+    Group* prevGroup = m_model->groupFromIndex(prevIndex);
+    setCurrentGroup(prevGroup);
+}
+
+void GroupView::nextGroup()
+{
+    auto nextIndex = indexBelow(currentIndex());
+    if (!nextIndex.isValid())
+        return;
+
+    Group* nextGroup = m_model->groupFromIndex(nextIndex);
+    setCurrentGroup(nextGroup);
+}
+
 void GroupView::contextMenuShortcutPressed()
 {
     auto index = currentIndex();

src/gui/group/GroupView.h

@@ -46,6 +46,8 @@ private slots:
     void syncExpandedState(const QModelIndex& parent, int start, int end);
     void modelReset();
     void contextMenuShortcutPressed();
+    void prevGroup();
+    void nextGroup();
 
 protected:
     void dragMoveEvent(QDragMoveEvent* event) override;