Author: Jun Pataleta
MDL-65949 report_participation: Use new core/checkbox-toggleall
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e773533258c7cd3206977fac52e5ed92ac71f425
http://github.com/moodle/moodle/commit/e773533258c7cd3206977fac52e5ed92ac71f425
+ 3.8 en [deselectnos,core]