Git commits in Moodle 3.8.5 by Tim Schroeder

commit 8ae39ac69e4b2adaed67b82f61a9809f5eecdb7b
Author: Tim Schroeder <t.schroeder@itc.rwth-aachen.de>
Date:   Thu, 16 Jul 2020 23:22:30 +0800
Tag:    v3.8.5

MDL-60574 atto_undo: fixed redo erasing content


commit 8c3e24b46ce630abc145641f42bd711c574d5bfe
Author: Tim Schroeder <t.schroeder@itc.rwth-aachen.de>
Date:   Tue, 05 May 2020 03:00:07 +0800
Tag:    v3.8.5

MDL-68605 mod_assign: return grp submissns from ws