fix missing csrf token on capsule group filter action

templates/capsule/index.html.twig

@@ -15,7 +15,8 @@
 
             {% if app.request.query.get('page')|default(1) == 1 %}
                 {% if current_user.getGroups()|length > 1 %}
-                    {{ form_start(filterByGroupForm, {'attr': {novalidate: 'novalidate', 'class': 'd-flex flex-row flex-nowrap'}}) }}
+                    {{ form_start(filterByGroupForm, {'attr': {novalidate: 'novalidate', 'class': 'd-flex flex-column flex-nowrap'}}) }}
+                    {{ form_widget(filterByGroupForm._token) }}
                     <div class="input-group">
                         {{ form_label(filterByGroupForm.name, 'groups.filter.label', { 'label_attr' : { 'class' : 'input-group-text mb-0'}}) }}
                         {{ form(filterByGroupForm.name, {'attr': {'class': 'choice-auto-submit' }})  }}