Git commits in Moodle 2.6.6 by Gregory Faller

commit 83d3fbccb6784b9f089476e1b3d7f75206b03b73
Author: Gregory Faller <greg.faller@flinders.edu.au>
Date:   Thu, 07 Aug 2014 15:50:59 +0800
Tag:    v2.6.6

MDL-46712: Center EditPDF window on browser resize / zoom