[gnome-shell] messageTray: Fix scroll bugginess in summary items

[Jasper St. Pierre <jstpierre src gnome org>]

commit 01f9d551f135379262ad55ad1e42f11da343db29
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Oct 24 20:06:39 2011 -0400

    messageTray: Fix scroll bugginess in summary items
    
    Two nested scroll views were fighing with each other. The reason isn't
    particularly important and has to do with some silliness involving
    StAdjustment. The visible effect was that scrolling up and down when
    in a summary item view would appear to be glitchy, and sometimes not
    work at all.
    
    To fix, make sure that the scroll view we don't care about is disabled
    when in a summary mode.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=661615

 js/ui/messageTray.js |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 19b3baf..7358b28 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -586,8 +586,10 @@ const Notification = new Lang.Class({
 
     enableScrolling: function(enableScrolling) {
         this._scrollPolicy = enableScrolling ? Gtk.PolicyType.AUTOMATIC : Gtk.PolicyType.NEVER;
-        if (this._scrollArea)
+        if (this._scrollArea) {
             this._scrollArea.vscrollbar_policy = this._scrollPolicy;
+            this._scrollArea.enable_mouse_scrolling = enableScrolling;
+        }
     },
 
     _createScrollArea: function() {