More Additions

You can now cancel inputting on a text or numberpad.
Zero is now displayed properly on the UI and not be shown as null.
The small and medium assemblies now have real sprites.
Total health percentage for med scanners and advanced med scanners now reports a proper percentage and not 1 or 0.
The constant memory chip now can be set by using it in hand, making it usable.
The constant memory chip now accepts refs as data to store.  To use, select 'ref' when using inhand, then hit it against the thing you want to store.

code/modules/integrated_electronics/assemblies.dm

@@ -3,19 +3,21 @@
 	desc = "It's a case, for building electronics with."
 	w_class = 2
 	icon = 'icons/obj/electronic_assemblies.dmi'
-	icon_state = "setup"
+	icon_state = "setup_small"
 	var/max_components = 10
 	var/max_complexity = 30
 	var/opened = 0
 
 /obj/item/device/electronic_assembly/medium
 	name = "electronic mechanism"
+	icon_state = "setup_medium"
 	w_class = 3
 	max_components = 20
 	max_complexity = 50
 
 /obj/item/device/electronic_assembly/large
 	name = "electronic machine"
+	icon_state = "setup"
 	w_class = 4
 	max_components = 30
 	max_complexity = 60
@@ -35,6 +37,12 @@
 		IC.work()
 */
 
+/obj/item/device/electronic_assembly/update_icon()
+	if(opened)
+		icon_state = initial(icon_state) + "-open"
+	else
+		icon_state = initial(icon_state)
+
 /obj/item/device/electronic_assembly/examine(mob/user)
 	..()
 	if(user.Adjacent(src))
@@ -87,6 +95,7 @@
 		playsound(src.loc, 'sound/items/Crowbar.ogg', 50, 1)
 		opened = !opened
 		user << "<span class='notice'>You [opened ? "opened" : "closed"] \the [src].</span>"
+		update_icon()
 	if(istype(I, /obj/item/device/integrated_electronics/wirer))
 		if(opened)
 			var/obj/item/integrated_circuit/IC = input(user, "Which circuit do you want to examine?", "Examination") as null|anything in contents