public ButtonNavigation FilterByMenu(string menu)
            {
                ButtonNavigation SubMenu = new ButtonNavigation();
                int ConfigIndex          = 0;

                while (ConfigIndex < this.Count)
                {
                    if (this[ConfigIndex].GetMenu() == menu)
                    {
                        SubMenu.Add(this[ConfigIndex]);
                    }
                    ConfigIndex++;
                }
                return(SubMenu);
            }