FR: Set rand values, new flags in Edit Ship

Pretty straightforward - there's room in the ship editor for fields to define a random range of numbers which would previously need to be defined via SEXP, as well as additional flags for subsystems. Could save time and would definitely save event bloat in the events editor.

Turret Locked flag is removed in favor of Subsystem locked, allowing developers to lock individual turrets.


Attached is a proposal for the new UI layout.

I understand that MFC is a pain and that not all of this may be feasible until QTFred.