Remove Payment type None

One-sentence description

Remove Payment type None

Why?

It is weird to have payment objects for payments that not yet have taken place. It makes much more sense to just have no payment then.

Current implementation

For registrations, we now make payments for every accepted registration, and change the type when it really is paid.

Suggested implementation

Make a payment object upon payment.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information