review: fix stuffs on socialAction and socialIssue filters:

* filters call static entity method
* add renderString option to manage add_children
* add tests on new entity method getDescendantsWithThisFor..()
* rename function in repository
* rename 'Select2..' classes by 'Pick..' and replace all occurences

src/Bundle/ChillPersonBundle/Repository/SocialWork/SocialActionRepository.php

@@ -68,7 +68,10 @@ final class SocialActionRepository implements ObjectRepository
         return SocialAction::class;
     }
 
-    public function findActionsNotDesactivated(): array
+    /**
+     * @return array|SocialAction[]
+     */
+    public function findAllActive(): array
     {
         return $this->buildQueryWithDesactivatedDateCriteria()->getQuery()->getResult();
     }