Integrates the z level manager with the space transition system

code/modules/computer3/computers/security.dm

@@ -57,7 +57,8 @@
 		if(!interactable())
 			return
 
-		if(computer.z > 6)
+		// TODO: Tie into space manager
+		if(computer.z > ZLEVEL_DERELICT)
 			to_chat(usr, "<span class='danger'>Unable to establish a connection</span>: You're too far away from the station!")
 			return
 		var/dat