Git commits in Moodle 3.7.x by Christian Wolters

commit d596f5ca6d0dd56f0178786ee19e4a92e57e5a4d
Author: Christian Wolters <christian.wolters@uni-luebeck.de>
Date:   Sun, 16 Dec 2018 22:43:49 +0800
Tag:    v3.7.0-beta

MDL-64025 admin_bookmarks: Enable bookmarking of admin categories