Show deregistration disclaimer text even if not registered for event

One-sentence description

The text stating you cannot deregister without paying a fine is not visible if you are not registered for the event.

Current behaviour / Reproducing the bug

Currently, the website does not show the deregistration disclaimer if you are not registered. This is undesirable, as it allows users to register for the event, without realising that they cannot deregister without paying a fine.

Expected behaviour

Always state the disclaimer (just like in the app).