Author: Van Binh Dang
MDL-75442 quiz: Highlight error message when manually grading
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b9ce55d66d0a5e2e1d53087fc8fb6672a1d38d83
http://github.com/moodle/moodle/commit/b9ce55d66d0a5e2e1d53087fc8fb6672a1d38d83
+ 4.4 en [savemanualgradingfailed,mod_quiz]