popupMenu: Close quick settings when activating settings action

Like the overview, the quick settings menu should be closed when
a launcher action is activated.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2392>

js/ui/popupMenu.js

@@ -572,6 +572,7 @@ var PopupMenuBase = class extends Signals.EventEmitter {
             }
 
             Main.overview.hide();
+            Main.panel.closeQuickSettings();
             app.activate();
         });