Git commits in Moodle 3.8.0 by Adrian Perez

commit a40cb785b0545377432a9069a8c542e132fee6ae
Author: Adrian Perez <p.adrian@gmx.ch>
Date:   Wed, 06 Nov 2019 05:30:13 +0800
Tag:    v3.8.0-beta

MDL-67048 progressbar: use bootstrap component to fix invert colors