Author: Simey Lameze
MDL-48679 gradebook: fix grade publishing feature
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9461ad93fd42e330bd71b44a81b15426dc51035a
http://github.com/moodle/moodle/commit/9461ad93fd42e330bd71b44a81b15426dc51035a
+ 2.8 en [gradepublishinglink,core_grades]