Author: Jake Dallimore
MDL-66147 mod_assign: submissions overview page shows time interval
Use get_time_interval_string() on the teacher only page, to show how
long after the course start the assignment is due for each user.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9e719b81d49caf2c38dad36eea97fc35045c4f43
http://github.com/moodle/moodle/commit/9e719b81d49caf2c38dad36eea97fc35045c4f43
+ 3.8 en [relativedatessubmissiontimeleft,mod_assign]
+ 3.8 en [relativedatessubmissionduedateafter,mod_assign]
+ 3.8 en [relativedatessubmissionduedatebefore,mod_assign]