private function setPropertiesForGoalsOverview($idSite)
{
$allGoals = $this->getGoals($idSite);
// set view properties
$this->config->columns_to_display = array('label', 'nb_visits');
foreach ($allGoals as $goal) {
$column = "goal_{$goal['idgoal']}_conversion_rate";
$this->config->columns_to_display[] = $column;
}
$this->config->columns_to_display[] = 'revenue_per_visit';
}