Hide record & NiGHTS attack options if there are no available maps for them.

Building upon !819 (merged), this merge request hides the record attack & NiGHTS attack menu options if there are no maps available for them, similar to how the Tutorial menu option is already handled. Useful for mods & level packs that don't feature NiGHTS special stages, to prevent them from having a permanent unselectable ?????? ???? option.