Non-Delve Private Leagues Look the Same as Delve Private Leagues

There's no way to tell when an ongoing Private League is not Delve. In fact, non-Delve private leagues even show delve ladder ranks. Example non-Delve league.

Easy solution: Instead of displaying Standard/Hardcore banner, display the challenge league banner! Standard/Hardcore is already indicated in the Rules text, "Hardcore: A character killed in Hardcore is moved to its parent league." (Its omission means it's Standard.)