Author: Jun Pataleta
MDL-68355 gradingform_guide: Fix accessibility issues
* Add sr-only label for criterion information.
* Add sr-only label for frequently used comments picker button.
* Removed unused string grade_help.
* Fixed tags for hidden help texts, changing them from <small> to <span>
* Added aria-label for the score and additional comments fields so that
the user would know which criterion they are currently working on.
* Added score_help and remark_help lang strings for more description
for the score and additional comments fields.
* Remove text-muted class for additional comments' field label to avoid
colour contrast issues.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3c2824623471a71f3aa302bfd8a0d21cbcbb137d
http://github.com/moodle/moodle/commit/3c2824623471a71f3aa302bfd8a0d21cbcbb137d
+ 3.9 en [additionalcommentsforcriterion,gradingform_guide]
+ 3.9 en [commentpickerforcriterion,gradingform_guide]
+ 3.9 en [informationforcriterion,gradingform_guide]
+ 3.9 en [remark_help,gradingform_guide]
+ 3.9 en [scoreforcriterion,gradingform_guide]
+ 3.9 en [score_help,gradingform_guide]