Manual recording of (partial) payments

If payments have been received for an invoice, there should be the ability to still manually record these payments or adjust the date from 'Paid' to the actual payment date.

The current system allows the invoice to be set to 'Paid' and the date/time of the action recorded.

There is a desire to adjust this date (time) to the actual payment date.

There is also the desire to add multiple payment dates to 1 invoice, if a customer does not pay the invoice in 1x. The possibility should then be there to simply register a payment, the data that should be registered are the date, amount, received with (Assets, current active - Cash) and more variants of this + a possible description.

Here the user can then register multiple payments made from the customer for this invoice.