Author: Petr Škoda
MDL-34852 allow editing of manual/self enrolments times and show time enrolled
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4c04933b99bb9f8a402f1984c6d564ca64907d83
http://github.com/moodle/moodle/commit/4c04933b99bb9f8a402f1984c6d564ca64907d83
+ 2.4 en [enroltimecreated,core_enrol]