adapt UI and controller for Person without centers

src/Bundle/ChillPersonBundle/Search/PersonSearch.php

@@ -153,7 +153,7 @@ class PersonSearch extends AbstractSearch implements ContainerAwareInterface,
     protected function search(array $terms, $start, $limit, array $options = array())
     {
         $qb = $this->createQuery($terms, 'search');
-        
+
         if ($options['simplify'] ?? false) {
             $qb->select(
                     'p.id',
@@ -176,7 +176,7 @@ class PersonSearch extends AbstractSearch implements ContainerAwareInterface,
         $qb
             ->orderBy('p.firstName')
             ->addOrderBy('p.lastName');
-        
+
         if ($options['simplify'] ?? false) {
             return $qb->getQuery()->getResult(Query::HYDRATE_ARRAY);
         } else {
@@ -291,10 +291,15 @@ class PersonSearch extends AbstractSearch implements ContainerAwareInterface,
         //restraint center for security
         $reachableCenters = $this->helper->getReachableCenters($this->user,
                 new Role('CHILL_PERSON_SEE'));
-        $qb->andWhere($qb->expr()
-                ->in('p.center', ':centers'))
-                ->setParameter('centers', $reachableCenters)
-                ;
+        $qb->andWhere(
+            $qb->expr()->orX(
+                $qb->expr()
+                    ->in('p.center', ':centers'),
+                $qb->expr()
+                    ->isNull('p.center')
+            )
+        );
+        $qb->setParameter('centers', $reachableCenters);
 
         $this->_cacheQuery[$cacheKey] = $qb;