Author: Jun Pataleta
MDL-59369 enrol: Cleanup enrol pages
* Cleanup edit enrolment form.
* Improve edit enrol form validation error message.
* Add modal custom data flag to edit enrolment form to hide action
buttons if loaded via fragment.
* Point return URLs of edit enrolment and user unenrol pages back to
participants page.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ea758b85e40c3a9d1fadb29f3a74a41b0005f142
http://github.com/moodle/moodle/commit/ea758b85e40c3a9d1fadb29f3a74a41b0005f142
+ 3.4 en [edituserenrolment,core_enrol]
+ 3.4 en [enroltimeendinvalid,core_enrol]