change block personcontent to content more consistent with other templates and less need for if-statements

src/Bundle/ChillActivityBundle/Resources/views/Activity/listPerson.html.twig

@@ -30,7 +30,7 @@
     {{ encore_entry_link_tags('mod_notification_toggle_read_status') }}
 {% endblock %}
 
-{% block personcontent %}
+{% block content %}
 
     {% set person_id = null %}
     {% if person %}