Git commits in Moodle 2.7.8 by papillon

commit 2a9e7de93cb58cdddc2a3e6a00308bde0ace1407
Author: papillon <papillon@muf.biglobe.ne.jp>
Date:   Mon, 16 Mar 2015 23:59:11 +0800
Tag:    v2.7.8

MDL-49311 user: fix default sorting problem