use default inventory like textures

inventory_plus/init.lua

@@ -72,7 +72,9 @@ inventory_plus.get_formspec = function(player, page)
 		.. default.gui_bg
 		.. default.gui_bg_img
 		.. default.gui_slots
-		.. "list[current_player;main;0,3.5;8,4;]"
+		.. "list[current_player;main;0,3.5;8,4;]" ..
+        "image[5.998,1;1,1;gui_furnace_arrow_bg.png^[transformR270]"..
+        default.get_hotbar_bg(0,3.509)
 
 	-- craft page
 	if page == "craft" then