apps-menu: Hide overview when launching app

Now that we no longer hide the overview when the menu is opened,
it is possible to activate menu entries from the overview. Start
hiding the overview in that case, which is consistent with app
launching elsewhere.

https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/69

extensions/apps-menu/extension.js

@@ -67,6 +67,8 @@ class ApplicationMenuItem extends PopupMenu.PopupBaseMenuItem {
         this._button.selectCategory(null);
         this._button.menu.toggle();
         super.activate(event);
+
+        Main.overview.hide();
     }
 
     setActive(active, params) {