add alert for not-in-household and actions in page

accompanyingCourse/summary

* alert for people not in household for each accompanying course;
* style for action in alert
* form to members editor

src/Bundle/ChillPersonBundle/Controller/AccompanyingCourseController.php

@@ -86,8 +86,19 @@ class AccompanyingCourseController extends Controller
      */
     public function indexAction(AccompanyingPeriod $accompanyingCourse): Response
     {
+        // compute some warnings
+        // get persons without household
+        $withoutHousehold = [];
+        foreach ($accompanyingCourse->getParticipations() as
+            $p) {
+            if (FALSE === $p->getPerson()->isSharingHousehold()) {
+                $withoutHousehold[] = $p->getPerson();
+            }
+        }
+
         return $this->render('@ChillPerson/AccompanyingCourse/index.html.twig', [
-            'accompanyingCourse' => $accompanyingCourse
+            'accompanyingCourse' => $accompanyingCourse,
+            'withoutHousehold' => $withoutHousehold
         ]);
     }