[gnome-shell] appDisplay: Fix app folder "modal-ness"

[Florian Müllner <fmuellner src gnome org>]

commit 9bbb3e9c85b9b444e5a82ee90dbdf09ae7474c5d
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Jun 16 10:24:39 2014 +0200

    appDisplay: Fix app folder "modal-ness"
    
    Commit 5d00c1a5ee moved app folder popups to GrabHelper - for some
    reason, the line that ensures the current behavior of only considering
    events inside the app picker to dismiss popups got lost ...

 js/ui/appDisplay.js |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index 854acd1..2f2ad02 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -1251,6 +1251,7 @@ const AppFolderPopup = new Lang.Class({
                 this.actor.destroy();
             }));
         this._grabHelper = new GrabHelper.GrabHelper(this.actor);
+        this._grabHelper.addActor(Main.layoutManager.overviewGroup);
     },
 
     toggle: function() {