Creating a link between Estimates and Invoices

Creating a link between Estimates and Invoices

I tried to find Support but can not find it any more so I will post this here.

Nearly all my business involves creating quotations (estimates), getting an order, and then, creating an invoice from my quotation.
It would be really really really nice if, when I created an invoice from the quotation, something was created to link the two.
In my ideal world, when I look at the listing of Estimates, instead of seeing "Invoiced", I saw "Inv-1234"

One complication is that sometimes there is more than one invoice per quotation; i.e. when I have to ship in two or more shipments.

Please, Please, Please!!!!!!!!!!!!!!!!!