fix autoplay for visitors

src/Muzich/CoreBundle/Controller/ElementController.php

         'id_limit' => $element_id+1
       ));
       
-      $elements = $search_object->getElements($this->getDoctrine(), $this->getUserId());
+      $elements = $search_object->getElements($this->getDoctrine(), $this->getUserId(true));
     }
     elseif ($type == 'favorite')
     {

src/Muzich/HomeBundle/Resources/views/Show/showGroup.html.twig

   </div>
   
   {% include "MuzichCoreBundle:SearchElement:default.html.twig" with {
-    'no_group_name' : true,
-    'his_group'     : his_group,
-    'group'         : group
+    'no_group_name'    : true,
+    'his_group'        : his_group,
+    'group'            : group,
+    'display_autoplay' : true,
+    'autoplay_context' : 'show_group'
   }%}
   
   {% if more_count is defined %}