/**
* overrule to add your own buttons.
*
* @return \Gems_Menu_MenuList
*/
protected function getMenuList()
{
$links = $this->menu->getMenuList();
$links->addParameterSources($this->request, $this->menu->getParameterSource());
$source = new \Gems_Menu_ParameterSource(array('gro_id_track' => $this->trackId, 'gro_id_round' => $this->trackEngine->getPreviousRoundId($this->roundId)));
$links->append($this->menu->getCurrent()->toActionLink(true, \MUtil_Html::raw($this->_('< Previous')), $source));
$links->addCurrentParent($this->_('Cancel'));
$links->addCurrentChildren();
$links->addCurrentSiblings();
$source->offsetSet('gro_id_round', $this->trackEngine->getNextRoundId($this->roundId));
$links->append($this->menu->getCurrent()->toActionLink(true, \MUtil_Html::raw($this->_('Next >')), $source));
return $links;
}