QmlDesigner: Fix shortcut override

Change-Id: I34867b463ce480542a894404f749fa46db06cc84
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/propertyeditor/quick2propertyeditorview.cpp

@@ -58,4 +58,31 @@ void Quick2PropertyEditorView::registerQmlTypes()
     }
 }
 
+bool Quick2PropertyEditorView::event(QEvent *e)
+{
+    static std::vector<QKeySequence> overrideSequences = { QKeySequence(Qt::SHIFT + Qt::Key_Up),
+                                                           QKeySequence(Qt::SHIFT + Qt::Key_Down),
+                                                           QKeySequence(Qt::CTRL + Qt::Key_Up),
+                                                           QKeySequence(Qt::CTRL + Qt::Key_Down)
+                                                         };
+
+    if (e->type() == QEvent::ShortcutOverride) {
+        auto keyEvent = static_cast<QKeyEvent *>(e);
+
+        static const Qt::KeyboardModifiers relevantModifiers = Qt::ShiftModifier
+                | Qt::ControlModifier
+                | Qt::AltModifier
+                | Qt::MetaModifier;
+
+        QKeySequence keySqeuence(keyEvent->key() | (keyEvent->modifiers() & relevantModifiers));
+        for (const QKeySequence &overrideSequence : overrideSequences)
+            if (keySqeuence.matches(overrideSequence)) {
+                keyEvent->accept();
+                return true;
+            }
+    }
+
+    return QQuickWidget::event(e);
+}
+
 } //QmlDesigner

src/plugins/qmldesigner/components/propertyeditor/quick2propertyeditorview.h

@@ -38,6 +38,9 @@ public:
     explicit Quick2PropertyEditorView(QWidget *parent = nullptr);
 
     static void registerQmlTypes();
+
+protected:
+    bool event(QEvent *e) override;
 };
 
 } //QmlDesigner