Make it possible to correct an acception or rejection in registrations

Ghost Userrequested to merge
feature/revert-registration-status into master

Closes #679 (closed), needs !951 (merged) first

Short description

Make it possible to correct an acception or rejection in registrations

Steps to use this feature

  1. Create, confirm and accept/reject registration
  2. Use revert
  3. Can accept/reject again
Edited by Ghost User

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