Author: Damyon Wiese
MDL-2283: Display number of assignment submissions that need grading in the grading summary
http://git.moodle.org/gw?p=moodle.git;a=commit;h=392ee02d6c53e3a9f497308f1e15591e0a345211
http://github.com/moodle/moodle/commit/392ee02d6c53e3a9f497308f1e15591e0a345211
+ 2.3 en [numberofsubmissionsneedgrading,mod_assign]