Author: Marty
MDL-86423 mod_assign: Reduce duesoon/overdue notifications.
Students shouldn't receive overdue notifications if there is nothing to
submit in Moodle.
Students shouldn't receive due soon notifications if they a) already
have a grade or b) meet activity completion status.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cd80e0ae07a88bdf8c03e0afe79fd4e20e0ff7b4
http://github.com/moodle/moodle/commit/cd80e0ae07a88bdf8c03e0afe79fd4e20e0ff7b4
+ 5.0 en [assignmentduesoonofflinehtml,mod_assign]