dankbar: add a mask while popouts are open

- Retains ability to click items on the bar, while another is open

quickshell/Common/ModalManager.qml

@@ -12,5 +12,7 @@ Singleton {
         if (!modal.allowStacking) {
             closeAllModalsExcept(modal)
         }
+        PopoutManager.closeAllPopouts()
+        TrayMenuManager.closeAllMenus()
     }
 }