Allow editing and date change for of incidentals/invoice charges

It would be very helpful if we could edit the date on invoices as we make our entries for all charges within the Master Folio and/or Desk Folio. We typically collect payment in advance for all our large groups, catering, weddings, etc. However, we need to be able to enter the invoice charges in advance in which we would enter the date for the actual event rather than the date of entry and be able to make edits on these invoices up until we collect payment.