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/grille.dm

@@ -68,7 +68,7 @@
 				return FALSE
 			to_chat(user, "<span class='notice'>You construct the window.</span>")
 			var/obj/structure/window/WD = new the_rcd.window_type(drop_location())
-			WD.anchored = TRUE
+			WD.setAnchored(TRUE)
 			return TRUE
 	return FALSE
 
@@ -145,7 +145,7 @@
 	else if((istype(W, /obj/item/screwdriver)) && (isturf(loc) || anchored))
 		if(!shock(user, 90))
 			W.play_tool_sound(src, 100)
-			anchored = !anchored
+			setAnchored(!anchored)
 			user.visible_message("<span class='notice'>[user] [anchored ? "fastens" : "unfastens"] [src].</span>", \
 								 "<span class='notice'>You [anchored ? "fasten [src] to" : "unfasten [src] from"] the floor.</span>")
 			return
@@ -194,7 +194,7 @@
 					WD = new/obj/structure/window/fulltile(drop_location()) //normal window
 				WD.setDir(dir_to_set)
 				WD.ini_dir = dir_to_set
-				WD.anchored = FALSE
+				WD.setAnchored(FALSE)
 				WD.state = 0
 				ST.use(2)
 				to_chat(user, "<span class='notice'>You place [WD] on [src].</span>")