Maybe make R&D console icons load faster (#33749)

* Maybe make design icons load faster

* Move design icon generation to asset_cache file

code/modules/research/designs.dm

@@ -51,40 +51,8 @@ other types of metals and chemistry for reagents).
 	return ..()
 
 /datum/design/proc/icon_html(client/user)
-	if (!icon_cache)
-		// construct the icon and slap it into the resource cache
-		var/atom/item = build_path
-		if (!ispath(item, /atom))
-			// biogenerator outputs to beakers by default
-			if (build_type & BIOGENERATOR)
-				item = /obj/item/reagent_containers/glass/beaker/large
-			else
-				return  // shouldn't happen, but just in case
-
-		// circuit boards become their resulting machines or computers
-		if (ispath(item, /obj/item/circuitboard))
-			var/obj/item/circuitboard/C = item
-			var/machine = initial(C.build_path)
-			if (machine)
-				item = machine
-		var/icon_file = initial(item.icon)
-		var/icon/I = icon(icon_file, initial(item.icon_state), SOUTH)
-
-		// computers (and snowflakes) get their screen and keyboard sprites
-		if (ispath(item, /obj/machinery/computer) || ispath(item, /obj/machinery/power/solar_control))
-			var/obj/machinery/computer/C = item
-			var/screen = initial(C.icon_screen)
-			var/keyboard = initial(C.icon_keyboard)
-			if (screen)
-				I.Blend(icon(icon_file, screen, SOUTH), ICON_OVERLAY)
-			if (keyboard)
-				I.Blend(icon(icon_file, keyboard, SOUTH), ICON_OVERLAY)
-
-		// based on icon2html
-		icon_cache = "[generate_asset_name(I)].png"
-		register_asset(icon_cache, I)
-	send_asset(user, icon_cache, FALSE)
-	return "<img class='icon' src=\"[url_encode(icon_cache)]\">"
+	send_asset(user, "design_[id].png", FALSE)
+	return "<img class='icon' src=\"design_[id].png\">"
 
 ////////////////////////////////////////
 //Disks for transporting design datums//