module ActiveAdmin::BaseController::Menu

def current_menu
  active_admin_config.namespace.menu
end

def set_current_tab
  @current_tab = if active_admin_config.belongs_to? && parent?
    active_admin_config.belongs_to_config.target.menu_item_name
  else
    [active_admin_config.parent_menu_item_name, active_admin_config.menu_item_name].compact.join("/")
  end
end