create new person: add an action and put action buttons in a dropdown

src/Bundle/ChillPersonBundle/Controller/PersonController.php

@@ -244,7 +244,9 @@ final class PersonController extends AbstractController
             'label' => 'Add the person'
         ])->add('createPeriod', SubmitType::class, [
             'label' => 'Add the person and create an accompanying period'
-        ]);
+        ])->add('createHousehold', SubmitType::class, [
+            'label' => 'Add the person and create an household'
+        ]); // TODO createHousehold form action
 
         $form->handleRequest($request);