Git commits in Moodle 3.8.x by Adrian Perez

commit 63b7cd9927ac6be66d643bc6299bafec05300451
Author: Adrian Perez <p.adrian@gmx.ch>
Date:   Wed, 08 Jan 2020 04:26:26 +0800
Tag:    v3.8.2

MDL-67626 assign: fix view full/view summary control in IE

commit 69e2477f90bc4862e07a305ce79e6c249d5edb3c
Author: Adrian Perez <adrian.perez@ffhs.ch>
Date:   Wed, 06 Nov 2019 17:56:56 +0800
Tag:    v3.8.4

MDL-67126 assign: set completion state for all group members

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