Ruin fixes

code/modules/nano/modules/nano_module.dm

@@ -1,6 +1,6 @@
 /datum/nano_module
 	var/name
-	var/host
+	var/datum/host
 
 /datum/nano_module/New(var/host)
 	src.host = host
@@ -8,5 +8,9 @@
 /datum/nano_module/nano_host()
 	return host ? host : src
 
+/datum/nano_module/on_ui_close(mob/user)
+	if(host)
+		host.on_ui_close(user)
+
 /datum/nano_module/proc/can_still_topic(var/datum/topic_state/state = default_state)
 	return CanUseTopic(usr, state) == STATUS_INTERACTIVE