Feature Request: Editable Due Date

I noticed the Due Date field is not able to be manually specified when editing a request. I would think this would be a nice-to-have feature. If a user has logged a "Needs new Blackberry for a new employee" and that employee doesn't start for 3 weeks - having the ability for a SupportRep to manually edit the Due Date and specify the start date of the employee as the Due Date, would be beneficial.

Even if a Due Date is determined by a configured SLA, having an editable Due Date would allow for SupportReps to over ride default due dates when extenuating circumstances required.

Possibly, "Edit Due Date" could be added as a ROLE-based option with two features - "Edit all due dates" or just "Edit all but SLA-defined due dates".