Add option for use_generic_version (C++ only) and expand to other controls

[KeyWorksRW]

Description:

There are actually quite a few widgets that have generic versions. It might make sense to implement a property called "use_generic_version" and only display the property if the preferred language supports the option. Once implemented, we could go through the 75 generic header files, and see which ones are actually control classes that we should offer a generic for.