[gnome-shell] dash: add a workaround for Clutter bug 692744

[Giovanni Campagna <gcampagna src gnome org>]

commit 8bcb10391ed342bf99447999c7e93a6a65eb9206
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Mon Jan 28 23:22:23 2013 +0100

    dash: add a workaround for Clutter bug 692744
    
    https://bugzilla.gnome.org/show_bug.cgi?id=690643

 js/ui/dash.js |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/dash.js b/js/ui/dash.js
index 1eb8d99..0de00a2 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -789,6 +789,10 @@ const Dash = new Lang.Class({
         for (let i = 0; i < addedItems.length; i++) {
             addedItems[i].item.show(animate);
         }
+
+        // Workaround for https://bugzilla.gnome.org/show_bug.cgi?id=692744
+        // Without it, StBoxLayout may use a stale size cache
+        this._box.queue_relayout();
     },
 
     _clearDragPlaceholder: function() {