Change Details

* [ ] Add ability to change primary event organiser * [ ] Add ability to add other users to the event for creation purposes * [ ] Change relevant access checks on organiser * [ ] Audit logging for organiser change?

* [x] Add ability to change primary event organiser * [ ] Add ability to add other users to the event for creation purposes (form needs backend implemented) * [ ] Change relevant access checks on organiser * [ ] Audit logging for organiser change?

* [ * [x] Add ability to change primary event organiser * [ ] Add ability to add other users to the event for creation purposes (form needs backend implemented) * [ ] Change relevant access checks on organiser * [ ] Audit logging for organiser change?