change ui for delete backend

app/controllers/settings/set_menu_items_controller.rb

@@ -112,6 +112,7 @@ class Settings::SetMenuItemsController < ApplicationController
     File.delete(path_to_file) if File.exist?(path_to_file)
     abc = MenuItem.deleteRecursive(@settings_menu_item)
 
+    flash[:notice] = 'Menu item was successfully destroyed.'
     render :json => {:status=> "Success", :url => settings_menu_category_simple_menu_items_path }.to_json
     # respond_to do |format|
     #   format.html { redirect_to settings_menu_category_set_menu_items_path(category_id,item_id), notice: 'Menu item was successfully destroyed.' }