Git commits in Moodle 2.5.x by Anthony Borrow

commit 1a1919412196174c7d967d3e5ba6037fe05147ee
Author: Anthony Borrow <anthony@moodle.org>
Date:   Thu, 03 Jan 2013 11:03:06 +0800
Tag:    v2.5.0-beta

MDL-15930 - admin: reorganize logic to allow ->fullnamedisplay to be used as default sort.