[enum] Fixed &named_args to work again in context of enum properties; added &!false_arg support.
[enum] Fixed &named_args to work again in context of enum properties; added &!false_arg support.

- &named_args broken a commit or two ago after separating
enum_properties[] from regular property_list[].
- Implemented &!false_arg support.

Plasmaworks/Rogue,Plasmaworks/Rogue,AbePralle/Rogue,AbePralle/Rogue,Plasmaworks/Rogue,Plasmaworks/Rogue