Developer credits
Git commits in Moodle 3.1.x by vpisabeywardana
commit 0a33c8ca9415b4e0b1c5b5fa0b653b6890d5efc8 Author: vpisabeywardana <vpisabeywardana@gmail.com> Date: Fri, 18 Mar 2016 00:00:19 +0800 Tag: v3.1.0-rc1 MDL-52815 theme: group select overlapping issue