Git merges in Moodle 3.5.7 by Sara Arjona

commit 1953f78e3e8c8e52e3c12d46ad6b119ab775699d
Author: Sara Arjona <sara@moodle.com>
Date:   Wed, 03 Jul 2019 17:16:08 +0800
Tag:    v3.5.7

Merge branch 'MDL-64794_35' of https://github.com/stronk7/moodle into MOODLE_35_STABLE


commit 9399070f9f615a2eb2c370c222074b65f6d74019
Author: Sara Arjona <sara@moodle.com>
Date:   Wed, 03 Jul 2019 03:21:57 +0800
Tag:    v3.5.7

Merge branch 'MDL-64614_35' of git://github.com/stronk7/moodle into MOODLE_35_STABLE


commit 16a14f010d0c285786b42568e95323179894e52e
Author: Sara Arjona <sara@moodle.com>
Date:   Thu, 27 Jun 2019 00:11:31 +0800
Tag:    v3.5.7

Merge branch 'MDL-60088-35' of git://github.com/Chocolate-lightning/moodle into MOODLE_35_STABLE


commit 55ca32ba7437503db87c35576259d20403b80592
Author: Sara Arjona <sara@moodle.com>
Date:   Tue, 14 May 2019 03:20:22 +0800
Tag:    v3.5.7

Merge branch 'MDL-65581-35' of git://github.com/bmbrands/moodle into MOODLE_35_STABLE