Git commits in Moodle 3.7.x by Mark Johnson

commit 7f45491d4dd6cc5ba143d7b48446330108905611
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Thu, 08 Aug 2019 16:08:08 +0800
Tag:    v3.7.2

MDL-66336 courses: Show an error when no course categories are visible

commit 6bdfddc463a39c363ed1d985fb395d986118c308
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Thu, 11 Apr 2019 16:02:31 +0800
Tag:    v3.7.3

MDL-65335 auth: Make oauth2 enabled check more efficient

commit 7d4c345820cd37aa8c46e9adc05d2d00b50814ee
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Wed, 27 Feb 2019 18:08:41 +0800
Tag:    v3.7.0-beta

MDL-64886 enrol: Make enrolledusercount optional in enrol_get_users_courses

commit 272c7948d2c992974c37a16c3d40ae2680667a15
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Mon, 18 Feb 2019 22:03:52 +0800
Tag:    v3.7.0-beta

MDL-64889 completion: Fix performance of get_course_progress_percentage

commit d6c06935c28f5dc8cf3f77f3ab2a4e2c029f91c8
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Tue, 12 Feb 2019 00:05:23 +0800
Tag:    v3.7.0-beta

MDL-64823 mobile: Fix prefix for disabled plugins

commit 7672471236d4d19b91e8bedc26616580bd8e016e
Author: Mark Johnson <mark.johnson@open.ac.uk>
Date:   Wed, 21 Nov 2018 18:27:33 +0800
Tag:    v3.7.0-beta

MDL-64123 webservices: Add valueused to completion data