Author: Jun Pataleta
MDL-76597 mod_quiz: Add label for question checkboxes
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7ad4bc126b8fd2d7e9fe3e467cb4d5f84a8107b6
http://github.com/moodle/moodle/commit/7ad4bc126b8fd2d7e9fe3e467cb4d5f84a8107b6
+ 4.0 en [selectquestionslot,mod_quiz]