Qt: Implement FIFO Player

Source/Core/DolphinQt2/MenuBar.h

@@ -62,6 +62,8 @@ signals:
 
   // Tools
   void BootGameCubeIPL(DiscIO::Region region);
+  void ShowFIFOPlayer();
+  void ShowAboutDialog();
 
   // Options
   void Configure();
@@ -77,8 +79,6 @@ signals:
   void GameListPlatformVisibilityToggled(const QString& row, bool visible);
   void GameListRegionVisibilityToggled(const QString& row, bool visible);
 
-  void ShowAboutDialog();
-
   // Movie
   void PlayRecording();
   void StartRecording();