Requests for 4.16 - 4.17

[Dig_Squid]

@RotemS;705100

Something really small:

-Enhance the UPROPERTY ‘EditCondition’ specifier to allow more than just boolean variable conditions. For a catch-all solution without too much hassle, allow to specify the name of a UFUNCTION returning bool and call it at runtime.
-Similarly, add a ‘VisibleCondition’ specifier! Would really clean up some of my UIs.

If you create a Details Customization for your class, you can do all kinds of more sophisticated logic for property editing!