/atom New() => Initialize() [MDB IGNORE] (#8298)

* Find and replace argless atom New() to Initialize().

* Manual replacement of no-arg New() to Initialize().

* Manually replacing remaining New() overrides.

* Fixing linter issues with now-removed New() args.

* Tidying area init overrides.

* Porting Neb's atom subsystem.

* Trying to isolate init problems.

* Adjusting Init code post-test.

* Merging duplicate Initialize() procs.

* Merge resolution.

code/modules/shieldgen/emergency_shield.dm

@@ -28,16 +28,16 @@
 		qdel(src)
 		return
 
-/obj/machinery/shield/New()
+/obj/machinery/shield/Initialize()
 	src.set_dir(pick(1,2,3,4))
-	..()
+	. = ..()
 	update_nearby_tiles(need_rebuild=1)
 
 /obj/machinery/shield/Destroy()
 	opacity = 0
 	density = 0
 	update_nearby_tiles()
-	..()
+	. = ..()
 
 /obj/machinery/shield/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	if(!istype(W)) return