Upon toggling off a window, now attempting to focus SongEditor, then any other visible editors, or finally the parent window if all editors are hidden.

include/MainWindow.h

@@ -145,6 +145,7 @@ private:
 	void finalize();
 
 	void toggleWindow( QWidget *window, bool forceShow = false );
+	void refocus();
 
 
 	QMdiArea * m_workspace;