NOISSUE WIP implementation of the ability to create instance shortcuts

Currently Linux-only and lacking some features

launcher/ui/MainWindow.h

@@ -141,6 +141,10 @@ private slots:
 
     void on_actionScreenshots_triggered();
 
+#if defined(Q_OS_LINUX)
+    void on_actionCreateShortcut_triggered();
+#endif
+
     void taskEnd();
 
     /**