Git commits in Moodle 3.8.x by Vitaly

commit 979f22b0eaa6bbcc6bbace902f884b78d774810f
Author: Vitaly <potenkov@gmail.com>
Date:   Wed, 16 Sep 2020 02:46:47 +0800
Tag:    v3.8.6

MDL-69342 core_user: fixed user picture updating