Author: Damyon Wiese
MDL-36012: Assignment, Accessibility - Add user information to alt text for grade icon in grading table.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=37eb2caa406749cc87f1502719e295be4e13a531
http://github.com/moodle/moodle/commit/37eb2caa406749cc87f1502719e295be4e13a531
+ 2.4 en [gradeuser,mod_assign]