How to show a project name in the header an Retainer Invoice?

I see that from the Project module one can create Estimates, Invoices, and Retainer Invoices and they are associated with that project. Great!

But, if I create a Retainer Invoice this way the Project Name appears outside of the actual invoice, not listed in the header (as it is with Estimates and Invoices).

Is there a way to list the Project Name in the header of a Retainer Invoice without having to manually type it in?