Git commits in Moodle 3.7.x by Andrew Zito

commit 85d5216840b662fdfcbec241b3c1592f99c17dd1
Author: Andrew Zito <zitoa@lafayette.edu>
Date:   Tue, 12 Feb 2019 03:48:14 +0800
Tag:    v3.7.5

MDL-63316 participants: lastname sort for participants table