Git commits in Moodle 3.7.x by andreasschenkel

commit 2dc47fdebad9fb812e191a151da3909ae7b3a39b
Author: andreasschenkel <31856043+andreasschenkel@users.noreply.github.com>
Date:   Mon, 12 Oct 2020 17:06:12 +0800
Tag:    v3.7.9

MDL-69844 user: Fix no email in download_participants_table