Git commits in Moodle 3.6.x by Martin Gauk

commit 580d8124c083f93589837e62cb5359d288822a0c
Author: Martin Gauk <gauk@math.tu-berlin.de>
Date:   Tue, 15 Oct 2019 21:55:06 +0800
Tag:    v3.6.7

MDL-66915 assign: Notify only if grade was updated in past 24 hours


commit ee3cecc141c78bd54b6ee0efd110add6d5668122
Author: Martin Gauk <gauk@math.tu-berlin.de>
Date:   Mon, 08 Jul 2019 17:10:11 +0800
Tag:    v3.6.6

MDL-58026 question: fix regrading in progress attempt


commit f484cf49c443212002664e688a20f1dc99c7bd66
Author: Martin Gauk <gauk@math.tu-berlin.de>
Date:   Mon, 25 Feb 2019 19:13:32 +0800
Tag:    v3.6.3

MDL-64941 qtype_multianswer: keep order of existing wrapped questions