Git commits in Moodle 3.9.x by Matt Davidson

commit abb81c79d74d4176889fa6d90cbfdedad3aff1c3
Author: Matt Davidson <davidso1@rose-hulman.edu>
Date:   Sat, 25 Jul 2020 02:26:17 +0800
Tag:    v3.9.2

MDL-63375 workshop: fix rubric grid view


commit 887679e510590f3c6426806c90e180da284f78ef
Author: Matt Davidson <davidso1@rose-hulman.edu>
Date:   Tue, 02 Jun 2020 21:28:29 +0800
Tag:    v3.9.0-beta

MDL-68163 gradebook: add grade item duplication