Lua: add support for unit class and class flags
Don't remember if I requested this API in some bigger bunch, but let it be here.
Some other missing uclass-related API (maybe also some iterator for getting native extras) that does not mention classes directly:
Don't remember if I requested this API in some bigger bunch, but let it be here.
Some other missing uclass-related API (maybe also some iterator for getting native extras) that does not mention classes directly: