Machine var shim (#18644)

* removal of machine var

* shimsham

* deprecation warnings

* COMSIG_LIVING_HANDLE_VISION signal

* improved

* more cleanup

* more fixes

* this is fine

* fixed radios

* notices for now, tgui fix

* cleaned up hud and vision parent calls, adds COMSIG_LIVING_HANDLE_HUD

* radios use tgui now

* guestpass does not need machine anymore

* cloning machine doesn't use it

* this arcade machine is tgui too

* autolathe does not need machine

* remaining cleanup

* doc fix

* fix

* logout handling

---------

Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/game/objects/items/stacks/stack.dm

@@ -48,7 +48,7 @@
 	AddElement(/datum/element/sellable/material_stack)
 
 /obj/item/stack/Destroy()
-	if (src && usr && usr.machine == src)
+	if (src && usr && usr.check_current_machine(src))
 		usr << browse(null, "window=stack")
 	if(islist(synths))
 		synths.Cut()
@@ -423,7 +423,7 @@
 				src.add_fingerprint(user)
 				F.add_fingerprint(user)
 				spawn(0)
-					if (src && user.machine==src)
+					if (src && user.check_current_machine(src))
 						src.interact(user)
 	else
 		..()
@@ -439,9 +439,9 @@
 		src.transfer_to(S)
 
 		spawn(0) //give the stacks a chance to delete themselves if necessary
-			if (S && user.machine==S)
+			if (S && user.check_current_machine(S))
 				S.interact(user)
-			if (src && user.machine==src)
+			if (src && user.check_current_machine(src))
 				src.interact(user)
 	else
 		return ..()