For those that love obtaining perfection r.e. ladder items

[Vvin-1767]

Allow cow level to be made post-King kill

Edit: Tweet confirmed cow king can now be slain and still open the portal. Congrats to everyone here, we did it! As the title suggests, I’d like to advocate for a #change here. In Diablo 2, when the Cow King is killed, everyone inside the Cow Level is instantly blacklisted on that character from ever creating a Cow Level again on that difficulty. I wish I knew the design philosophy behind this code, seems like a bad design in my opinion, given that the Diablo 2 end-game is all repeat farm…