Add ScreenSaver.

src/windows/MainWindow.h

@@ -18,7 +18,6 @@ class QGestureEvent;
 class QSwipeGesture;
 class QPanGesture;
 class QDockWidget;
-class LoginDialog;
 
 class MainWindow : public QMainWindow
 {
@@ -31,6 +30,7 @@ public:
     void centerWidgetHide();
     void centerWidgetShow();
     void requestLogin();
+    void requestScreenSaver();
     QTextEdit* getEdit();
     void debugConsoleOn();
     void grabGestures(const QList<Qt::GestureType>& aGestures);
@@ -59,7 +59,6 @@ private:
     QTextEdit* mDebugMessageConsole;
     QTabWidget* mTabWidget;
     int mAdminTabIndex;
-    LoginDialog* mLoginDialog;
     QThread* mThread;
     bool mIsDebugMode;