Quotes/estimates has a "transaction history" option (with right click) however there is never any history to such a transaction.
I have often wanted such history: for example I want to know if the quote has been completed and invoiced, but even though it has been used to create an invoice the history does not show the invoice and the invoice history does not show the estimate. The only way to tell if the estimate has been invoiced is to manually compare transactions in the client window.