I'm a little confused on how the estimate feature is supposed to work. When I create an estimate and send it to a customer, they can accept it. If they do, I expect to have a "confirmed" estimate or something like that. Instead, I get an invoice auto created with payment due. This is not what I would expect from this feature. Can I make the system NOT auto generate an invoice on an accepted estimate? I'd like to create the invoice AFTER the work and not before.