Add a visual marker on invoices that have been forwarded using the Email Routing feature

Please add a clear visual marker to invoices that have been forwarded to an email address, using the Email Routing integration.
The marker should be visible in the list of invoices on the dashboard and it should be possible to filter the list in order to see only the invoices that haven’t been forwarded.
It would also be useful to be able to see exactly which email address each invoice has been forwarded to.