Overlay queuing (#23922)

* Overlay queuing

* Fix SS flags

* Don't copy on assignment

* Flags processing

* Fix icon_smoothing

* MSO's helper proc

* Legacy detection

* Make it work

* Fixes shitcode

* Fix the flag

* |= -> +=

* OK, how did I fuck that up?

* shitcode

* Conditional assoc queue while initializing

* Cleanup everything

* Orange meme

* This isn't perfect, but its the best byond will give us.

* forgot about dir

* oh ya

* This was litterally the last thing i did last night before heading to bed

You can tell can't you?

* Fixes various shit

* Let's not ever pause

* Fix the flag

* Cleaned up some missing shit. Added image dummys

* Remove the one usage of FPRINT

* Jesus get rid of this

code/modules/modular_computers/computers/machinery/modular_computer.dm

@@ -64,7 +64,7 @@ var/list/global_modular_computers = list()
 		if(cpu.active_program)
 			add_overlay(cpu.active_program.program_icon_state ? cpu.active_program.program_icon_state : screen_icon_state_menu)
 		else
-			overlays.Add(screen_icon_state_menu)
+			add_overlay(screen_icon_state_menu)
 
 	if(cpu && cpu.obj_integrity <= cpu.integrity_failure)
 		add_overlay("bsod")