Fixes / improvements found during testing

* Redundant "simulatorStatusChanged" signal in proxy
* invokeMethod for timer
* removed redundant this->buildNavigator(1)
* Shortcut in GUI
* comment in variant

src/blackgui/components/navigatordockwidget.h

@@ -34,7 +34,7 @@ namespace BlackGui
             explicit CNavigatorDockWidget(QWidget *parent = nullptr);
 
             //! Destructor
-            ~CNavigatorDockWidget();
+            virtual ~CNavigatorDockWidget();
 
             //! Add action as navigator item
             void addAction(QAction * action);