QmlDesigner: Don't mix functions and variables

Change-Id: I045a58c2567b644034a91c606fefc4ebe83ca6de
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

src/plugins/qmldesigner/components/navigator/navigatorwidget.h

@@ -59,8 +59,10 @@ signals:
     void upButtonClicked();
     void downButtonClicked();
 
-private:
+private: // functions
     NavigatorView *navigatorView() const;
+
+private: // variables
     NavigatorTreeView *m_treeView;
     QWeakPointer<NavigatorView> m_navigatorView;
 };