Fix message for cancelling after deadline
Closes #396 (closed)
Before:
- Go to an event with a deadline that is after today, make sure there is a queue.
- Try to cancel your registration
- Get the message that you're cancelling after the deadline
After:
- Go to an event with a deadline that is after today, make sure there is a queue.
- Try to cancel your registration
- Don't get a message that you're cancelling after the deadline