Additions for View navigation, including saving dockwidget locations and...

Additions for View navigation, including saving dockwidget locations and status. Also added remembering of "Advanced Mode" between restarts of QGC

src/ui/MainWindow.h

@@ -288,6 +288,7 @@ protected:
      * @param location  The default location for the QDockedWidget in case there is no previous key in the settings
      */
     void addTool(SubMainWindow *parent,VIEW_SECTIONS view,QDockWidget* widget, const QString& title, Qt::DockWidgetArea area);
+    void loadDockWidget(QString name);
 void createDockWidget(QWidget *parent,QWidget *child,QString title,QString objectname,VIEW_SECTIONS view,Qt::DockWidgetArea area,int minwidth=0,int minheight=0);
     /**
      * @brief Adds an already instantiated QWidget to the center stack