Git commits in Moodle 3.9.5 by Mark Nelson

commit 1e10d9328ed0ddd04aeafd543606baecccf040df
Author: Mark Nelson <mdjnelson@gmail.com>
Date:   Sat, 09 Jan 2021 14:13:08 +0800
Tag:    v3.9.5

MDL-70125 core_grade: do not change overridden status during regrading