Author: Michael Hughes
MDL-48215 gradingform_guide: Name length validation
Validating both criterion name and guide name to be 255 chars.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3a1cc9475d0a7fcc8ab4272d7edf4769afe7fa6f
http://github.com/moodle/moodle/commit/3a1cc9475d0a7fcc8ab4272d7edf4769afe7fa6f
+ 2.9 en [err_shortnametoolong,gradingform_guide]