Git commits in Moodle 2.7.5 by Nivedita Setru

commit 04f14e30478c52fc327e8f734f384c739de4af80
Author: Nivedita Setru <n.setru@ucl.ac.uk>
Date:   Wed, 14 Jan 2015 10:28:22 +0800
Tag:    v2.7.5

MDL-48073 enrol: Fixed group filter resetting erroneously.