Git commits in Moodle 3.7.4 by Adrian Perez

commit 5b5b171b7588e492f30740d017a4b9f7fe684bf3
Author: Adrian Perez <p.adrian@gmx.ch>
Date:   Wed, 06 Nov 2019 05:30:13 +0800
Tag:    v3.7.4

MDL-67185 progressbar: use bootstrap component to fix invert colors