additional aXcelerate finance permissions

We would like to have a high level finance permission that would allow select users the ability to unlink a payment from an exported invoices.

Currently, if a partial payment has been recorded and exported incorrectly you have to credit the whole invoice, record the refund, create a new invoice and re-record any correct partial payments.

This permission would allow our accounts department to correct any partial payment errors in axcelerate and in MYOB/Xero with much less hassle.