#412 remove active groups settings from mod_form to avoid inconsistency
#437 remove sorting functionality for userlist's registration and queue columns
#428 clean param manual for from/to/digits fields

To avoid problems with non-digit-characters in these fields we cleaned the params by hand so we can catch some nonvalid input data.
#427 clean param manual for amount field

To avoid problems with non-digit-characters in these fields we cleaned the params by hand so we can catch some nonvalid input data.
#415 clean param manual for group members

To avoid problems with non-digit-characters in these fields we cleaned the params by hand so we can catch some nonvalid input data.
#408 workaround for permission-problems when creating events
#425 prevent errors after conflicts in groupnames have been detected
fix message displayed instead of userlist if no users present
#439 fix conditions for showing myMoodle-output
edit just for push