Git commits in Moodle 3.8.0 by Arto Nieminen

commit 91472736408b2185563068cf3a2280cded5acecb
Author: Arto Nieminen <arto.nieminen@mediamaisteri.com>
Date:   Fri, 07 Jun 2019 15:27:47 +0800
Tag:    v3.8.0-beta

MDL-53778 quiz settings: Ensure that disabled checkboxes have value 0