1.8 - NPC Sheets now mostly supported. However there is a bug, namely that if more than one NPC is open at once, rolling on one sheet can cause another to resend its last roll while open in another tab. Currently I don't see an easy way around this as long as Demiplane is keeping all NPC rolls in local storage under the same undefined namespace (meaning they can overwrite eachother's roll histories when multiple are open).