Author: Steve Bader
MDL-30852 grade report: Add aria attributes
Converted to git branch by Damyon
http://git.moodle.org/gw?p=moodle.git;a=commit;h=95ad1cee1276c04dd2b94054d4bab99698306430
http://github.com/moodle/moodle/commit/95ad1cee1276c04dd2b94054d4bab99698306430
+ 2.5 en [tablesummary,gradereport_user]