Fix constructed directional windows leaking atmos, wrap setting of the anchored var on objects (#38934)

* Wrap setting anchored for structures, fix atmos bug

* forgot this

* Add a signal for setanchored

* move setanchored to obj

* machinery, also some structure stuff

* tabbing

code/game/objects/structures/door_assembly.dm

@@ -106,7 +106,7 @@
 						return
 					to_chat(user, "<span class='notice'>You secure the airlock assembly.</span>")
 					name = "secured airlock assembly"
-					anchored = TRUE
+					setAnchored(TRUE)
 			else
 				to_chat(user, "There is another door here!")
 
@@ -119,7 +119,7 @@
 					return
 				to_chat(user, "<span class='notice'>You unsecure the airlock assembly.</span>")
 				name = "airlock assembly"
-				anchored = FALSE
+				setAnchored(FALSE)
 
 	else if(istype(W, /obj/item/stack/cable_coil) && state == AIRLOCK_ASSEMBLY_NEEDS_WIRES && anchored )
 		if(!W.tool_start_check(user, amount=1))
@@ -281,7 +281,7 @@
 	target.heat_proof_finished = source.heat_proof_finished
 	target.created_name = source.created_name
 	target.state = source.state
-	target.anchored = source.anchored
+	target.setAnchored(source.anchored)
 	if(previous)
 		target.previous_assembly = source.type
 	if(electronics)