[gnome-shell] overviewControls: Mark the DashSlider as x_expand

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

commit faf7b62f5c1f40ac198252ce1e3437c3e80b62eb
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Wed Sep 18 19:40:38 2013 -0400

    overviewControls: Mark the DashSlider as x_expand
    
    Actors need to expand in order for them to their x_aligns to be taken
    into account.

 js/ui/overviewControls.js |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 1ca4178..00007f2 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -323,6 +323,7 @@ const DashSlider = new Lang.Class({
         // available allocation
         this._dash.actor.x_expand = true;
 
+        this.actor.x_expand = true;
         this.actor.x_align = Clutter.ActorAlign.START;
         this.actor.y_expand = true;