Git commits in Moodle 3.6.0 by Jason Platts

commit e52856bc9ae8dee97f897cdec1ae9e05618f5a35
Author: Jason Platts <j.platts@open.ac.uk>
Date:   Mon, 11 Jun 2018 22:09:42 +0800
Tag:    v3.6.0-beta

MDL-62520 user: User identity fields not searchable in Participants list