Thalia Pay: also enable late-cancellation fines to happen with Thalia Pay

[thaliawww-service]

In GitLab by @JobDoesburg on Oct 23, 2019, 21:40

One-sentence description

Also enable late-cancellation fines to happen with Thalia Pay

Motivation

Because it is weird to do let this happen via invoices if people normally can pay with Thalia Pay

Desired functionality

Currently if somebody wants has said to pay with Thalia Pay, but cancels, we delete the payment.
After the event, the treasurer should be able to determine the real amount of the fine and have some action available to add TPAY payments for everyone that was too late and deserves a fine (now we will probably need to reopen #821 heheheheh)

Suggested implementation

[thaliawww-service]

In GitLab by @se-bastiaan on Oct 25, 2019, 11:56

The treasurer is able to manually create payments in the admin so I believe this would already be possible.
And they can always add the payment to the batch manually.

[JobDoesburg]

With moneybird sync this becomes more important

[JobDoesburg]

Also relevant for #3453