Chem Dispenser (see the beakers)

Adds a tiny new sprite that allows you to see if a beaker is in the
chemistry machine or not.

code/modules/reagents/Chemistry-Machinery.dm

@@ -179,7 +179,7 @@
 			var/obj/item/weapon/reagent_containers/glass/B = beaker
 			B.loc = loc
 			beaker = null
-
+			icon_state = "dispenser"
 	add_fingerprint(usr)
 	return 1 // update UIs attached to this object
 
@@ -211,6 +211,7 @@
 		B.loc = src
 		user << "You set [B] on the machine."
 		nanomanager.update_uis(src) // update all UIs attached to src
+		icon_state = "dispenser2"
 		return
 
 /obj/machinery/chem_dispenser/attack_ai(mob/user as mob)