[Frontend] Extend FAQ about deleting a reservation

[smessie]

There already exists a small explanation on how to delete/cancel a reservation, but we should extend this.
Currently it lives as the last alinea of "Studielocatie reserveren" but we want to give it its own dedicated title so people will find it with more ease.
Lets see how we can also make the explanation more clear, maybe also add the option of going to your profile and clicking on the X to cancel as well, as we are getting quite some emails with students wanting to delete their reservation and not knowing how.