Currently it is hard to keep track of line items, such as what items are currently paid for, on an invoice, etc. when you convert an estimate to an invoice

We would love to see when an estimate is converted and attached to a ticket, that it automatically puts the line items on the ticket itself, marks them as on a current invoice, and when that invoice is paid it marks them as such.

Basically we want invoices on tickets that were created from estimates to act the same was as an invoice created from a ticket using the "Make Invoice" button.

Also, currently when you convert an estimate to an invoice it leaves the estimate in place and attaches the new invoice to a ticket.

However it would be much better (as has been already suggested) if when converted the estimate is then removed (or marked completed/approved).