Quote Revised Email + PO Field in Subject

I think it would be of value to add a second email template with a [Revised] or v1.1 in the email subject to let the customer know that this is the revised quote. Sometimes when the emails stack it is tricky for the customer to realize a change has been made, especially if they aren't familiar with the customer dashboard (we don't attach PDFs incase we mess up and need to make a quick change.)

Below may already be possible, so please inform me if it is.

I also think it would be valuable to have the PO# in the subject of the email so the customer has something to reference. I've tried to automate this, but can't seem to have any luck. This is especially helpful for trade printers & repeat customers.