Git merges in Moodle 3.7.7 by Jun Pataleta

commit 617df25335c85b7e689319e0c3633b3e4e09f894
Author: Jun Pataleta <jun@moodle.com>
Date:   Wed, 10 Jun 2020 11:26:33 +0800
Tag:    v3.7.7

Merge branch 'MDL-68864-37' of git://github.com/junpataleta/moodle into MOODLE_37_STABLE

commit ad06a6f7dff203f28de46c3e42842995221671fc
Author: Jun Pataleta <jun@moodle.com>
Date:   Wed, 27 May 2020 11:24:44 +0800
Tag:    v3.7.7

Merge branch 'MDL-68750-37' of git://github.com/andrewnicols/moodle into MOODLE_37_STABLE

commit 99f889d2af718a74f33648ea5afe203c9da2e79e
Author: Jun Pataleta <jun@moodle.com>
Date:   Tue, 12 May 2020 00:03:03 +0800
Tag:    v3.7.7

Merge branch 'MDL-66109-37' of git://github.com/andrewnicols/moodle into MOODLE_37_STABLE