Author: Rajesh Taneja
MDL-34777 Accessibility: Add labels to input elements in gradebook
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7400be1b6e65a8f76f48607e439e6c0103ce45e0
http://github.com/moodle/moodle/commit/7400be1b6e65a8f76f48607e439e6c0103ce45e0
+ 2.4 en [droplowestvalue,core_grades]
+ 2.4 en [select,core_grades]
+ 2.4 en [selectuser,mod_assign]