Developer credits
Git commits in Moodle 2.9.0 by Jason Platts
commit a75a381f0469098f95ef53c0d8f62b755c5c17d1 Author: Jason Platts <j.platts@open.ac.uk> Date: Mon, 19 Jan 2015 18:23:18 +0800 Tag: v2.9.0-beta MDL-48437 Make Visible/All groups selector show own groups first