Booking list filter for "card on file" and "no card on file"

The bookings list view has a lot of useful filters including showing bookings where the rental agreement has not yet been signed. However one filter that is missing is "card on file" or "no card on file". Many owners require both a signed legal agreement and a card on file for secdep. Currently we can filter for the former but not the latter. So this request is to add a filter for "card on file" or "no card on file". Thanks!