Determines if this display's path is a default tab.
bool TRUE if the display path is for a default tab, FALSE otherwise.
protected function isDefaultTabPath() {
$menu = $this
->getOption('menu');
$tab_options = $this
->getOption('tab_options');
return $menu['type'] == 'default tab' && !empty($tab_options['type']) && $tab_options['type'] != 'none';
}