Added bucket lid sprite and functionality

Buckets can be lidded, however there is no change in the sprite when
this happens. This adds a lid and it's functional in game.

code/modules/reagents/reagent_containers/glass.dm

@@ -280,6 +280,13 @@
 			user.put_in_hands(new /obj/item/weapon/bucket_sensor)
 			user.drop_from_inventory(src)
 			del(src)
+			
+	update_icon()
+		overlays.Cut()
+
+		if (!is_open_container())
+			var/image/lid = image(icon, src, "lid_[initial(icon_state)]")
+			overlays += lid
 
 // vials are defined twice, what?
 /*