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/machinery/camera/camera_assembly.dm

@@ -42,7 +42,7 @@
 			if(istype(W, /obj/item/weldingtool))
 				if(weld(W, user))
 					to_chat(user, "<span class='notice'>You weld the assembly securely into place.</span>")
-					anchored = TRUE
+					setAnchored(TRUE)
 					state = 2
 				return
 		if(2)
@@ -62,7 +62,7 @@
 				if(weld(W, user))
 					to_chat(user, "<span class='notice'>You unweld the assembly from its place.</span>")
 					state = 1
-					anchored = TRUE
+					setAnchored(TRUE)
 				return
 
 	// Upgrades!