[gnome-shell] Revert "overviewControls: Always allocate the actor its full size"

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

commit e6c28cf509b794d10fcbae34e94fbf85d932d494
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Wed Oct 30 18:32:26 2013 -0400

    Revert "overviewControls: Always allocate the actor its full size"
    
    This reverts commit f5a9dbb348632864095179f5f88a6fef9707e7c7.
    
    This broke the alignment of the workspace thumbnail widget. I don't
    know why, but let's not break things if we can...

 js/ui/overviewControls.js |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/overviewControls.js b/js/ui/overviewControls.js
index 1a06457..98480c8 100644
--- a/js/ui/overviewControls.js
+++ b/js/ui/overviewControls.js
@@ -68,7 +68,7 @@ const SlideLayout = new Lang.Class({
 
         let actorBox = new Clutter.ActorBox();
         actorBox.x1 = box.x1 + alignX + this._translationX;
-        actorBox.x2 = actorBox.x1 + availWidth;
+        actorBox.x2 = actorBox.x1 + child.x_expand ? availWidth : natWidth;
         actorBox.y1 = box.y1;
         actorBox.y2 = actorBox.y1 + availHeight;
 
@@ -323,6 +323,11 @@ const DashSlider = new Lang.Class({
 
         this._dash = dash;
 
+        // SlideLayout reads the actor's expand flags to decide
+        // whether to allocate the natural size to its child, or the whole
+        // 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;