use the default background colors and hotbar image for the autocrafter formspec

autocrafter.lua

@@ -149,6 +149,10 @@ local function set_formspec(meta, enabled)
 			"image_button[3,2;1,1;pipeworks_button_" .. state .. ".png;" .. state .. ";;;false;pipeworks_button_interm.png]" ..
 			"list[context;src;0,3.5;8,3;]"..
 			"list[context;dst;4,0;4,3;]"..
+			default.gui_bg..
+			default.gui_bg_img..
+			default.gui_slots..
+			default.get_hotbar_bg(0,7) ..
 			"list[current_player;main;0,7;8,4;]")
 end