Git merges in Moodle 3.5.8 by Jun Pataleta

commit 313fd64469645642108f37f846cb58b86bcbae9e
Author: Jun Pataleta <jun@moodle.com>
Date:   Wed, 14 Aug 2019 15:25:36 +0800
Tag:    v3.5.8

Merge branch 'MDL-65925-grade-page-broken-for-deleted-submission-MOODLE_35_STABLE' of https://github.com/ilya-catalyst/moodle into MOODLE_35_STABLE


commit c3e7a570f3fc8b6daf8782e5220069b082ab508f
Author: Jun Pataleta <jun@moodle.com>
Date:   Fri, 09 Aug 2019 16:23:58 +0800
Tag:    v3.5.8

Merge branch 'install_35_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_35_STABLE


commit 0094a77cccb4e63852adb9adf66b40466501f214
Author: Jun Pataleta <jun@moodle.com>
Date:   Thu, 11 Jul 2019 10:59:29 +0800
Tag:    v3.5.8

Merge branch 'MDL-65926-MOODLE_35_STABLE_lowercase_username_sql_query' of https://github.com/andrewmadden/moodle into MOODLE_35_STABLE