As an admin I want to allow Reporters to accept a resolved request before closing it

At the moment, every Issue with the Resolution populated will be reconized as completed and hidden from the "Current requests" screen in the Customer Portal. However, it should be possible to allow the Reporter to accept a ticket in the Resolved state before closing it off completely.

This function is very important for many users. I think it would be best to add an option to define a Status that should be considered "resolved", so that the Reporter user can accept or refuse the solution (similarly to the definition of a "Done" state in an Agile board).