When deciding to put bank info on invoices, only look at active methods

When deciding to put bank info on invoices, only look at active methods

If a payment method that had bank info on it was added to an invoice, we
would include the bank data on the PDF even if the method was not marked
as active. It would still not show on the webpage of available methods,
but if someone forwarded the PDF alone for payment, they would get the
bank info for an inactive method. So fix that.