/**
  * Build popup menu
  *
  * @param File $record
  * @return PopoverField
  */
 protected function getPopoverMenu($record)
 {
     // Build popover actions
     $popoverActions = array_filter([$this->getAddToCampaignAction($record), $this->getUnpublishAction($record), $this->getDeleteAction($record)]);
     if ($popoverActions) {
         return PopoverField::create($popoverActions)->setPlacement('top')->setButtonTooltip(_t('SilverStripe\\AssetAdmin\\Forms\\FileFormFactory.OTHER_ACTIONS', 'Other actions'));
     }
     return null;
 }