Fix Orbit menu BSOD (#14828)

* Probably fix orbit menu BSOD

* Also add a check to js

* Add a stacktrace

code/modules/mob/dead/observer/orbit.dm

@@ -48,7 +48,9 @@
 	var/list/pois = getpois(mobs_only=TRUE)
 	for(var/name in pois)
 		var/list/serialized = list()
-		serialized["name"] = name
+		serialized["name"] = "[name]" // stringify it; If it's null or something - we'd like to know it and fix getpois()
+		if(name == null || serialized["name"] != name)
+			stack_trace("getpois returned something under a non-string name [name] - [pois[name]]")
 
 		var/poi = pois[name]