[gnome-shell] messageTray: Allow dwell to work in the overview

[Adel Gadllah <agadllah src gnome org>]

commit 9a30c3d72266ce3db15a084bbc91bdca186855a4
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Sun Feb 17 20:13:46 2013 +0100

    messageTray: Allow dwell to work in the overview
    
    Special case the overview in _trayDwellTimeout because the
    tray is hidden by default in the overview now.

 js/ui/messageTray.js |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 1e2c078..c1ab9ea 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1850,7 +1850,10 @@ const MessageTray = new Lang.Class({
     _trayDwellTimeout: function() {
         this._trayDwellTimeoutId = 0;
 
-        if (Main.modalCount > 0)
+        // We don't want to open the tray when a modal dialog
+        // is up, so we check the modal count for that. When we are in the
+        // overview we have to take the overview's modal push into account
+        if (Main.modalCount > (Main.overview.visible ? 1 : 0))
             return false;
 
         // If the user interacted with the focus window since we started the tray