Author: Dan Marsden
MDL-31731 Advanced Grading: Marking Guide display scale warning for higher max grade as well as lower.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6c2092582766a3b5ce7439be63abbc4b8c4df439
http://github.com/moodle/moodle/commit/6c2092582766a3b5ce7439be63abbc4b8c4df439
+ 2.3 en [guidemappingexplained,gradingform_guide]