Git commits in Moodle 3.10.1 by John Yao

commit bf17d50cf64ee7ac8449cea10a1d572f0ac887e6
Author: John Yao <johnyao@catalyst-au.net>
Date:   Thu, 19 Nov 2020 09:36:32 +0800
Tag:    v3.10.1

MDL-67636 gradebook: Prevent exposing hidden grade in locked category