[MIRROR] Persistent papers should not replace the chat window (#8505)

Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>
Co-authored-by: CHOMPStation2 <chompsation2@gmail.com>

code/modules/persistence/effects/paper.dm

@@ -17,6 +17,8 @@
 	var/obj/item/weapon/paper/paper = new paper_type(creating)
 	paper.info = token["message"]
 	paper.name = token["title"]
+	if(!paper.name)
+		paper.name = "No Title"
 	paper.last_modified_ckey = token["author"]
 	paper.age = token["age"]+1
 	if(requires_noticeboard)