WorkspacesView: set the clip when setting the geometry

Fixes clipping the windows when you open the overview with the workspace
switcher expanded and then shrink it.

https://bugzilla.gnome.org/show_bug.cgi?id=694092

js/ui/workspacesView.js

@@ -151,6 +151,9 @@ const WorkspacesView = new Lang.Class({
 
         for (let i = 0; i < this._workspaces.length; i++)
             this._workspaces[i].setGeometry(x, y, width, height);
+
+        if (Main.overview.visible && !Main.overview.animationInProgress)
+            this.actor.set_clip(this._x, this._y, this._width, this._height);
     },
 
     _lookupWorkspaceForMetaWindow: function (metaWindow) {