Fix for second attribute option label in filter settings

Author: zonky2

src/Filter/Setting/SimpleLookup.php

@@ -117,7 +117,7 @@ protected function getParameterFilterOptions($objAttribute, $arrIds, &$arrCount
             $arrOptions = $this->getLabelAttributeValuesByOptionsList(
                 $objAttribute,
                 $labelAttribute,
-                ((bool) $this->get('onlyused')) ? $arrIds : null
+                ((bool) $this->get('onlypossible')) ? $arrIds : null
             );
         } else {
             $arrOptions = $objAttribute->getFilterOptions(