🌟Edit orders as admin

[Gijsen]

Edit orders as admin user in the admin panel.

Edit names of attendees, add users, modify types or responses to questions

[daveearley]

Thanks @Gijsen! Good suggestion. I'll see if I can squeeze this into v1, as it has been requested many times.

[daveearley]

Update: This will be introduced as part of this PR. Initially it won't include editing questions, but that will be a fast follow.

[daveearley]

Closing, as this was added in v1