Git commits in Moodle 3.8.x by Sagar Ghimire

commit e523e85462ac12541f313f03b655813b863b30f0
Author: Sagar Ghimire <gmrsagar@gmail.com>
Date:   Mon, 24 Aug 2020 09:40:49 +0800
Tag:    v3.8.6

MDL-68284 gradebook: Prevent exposing hidden quiz grade item