Fix boolean filter dropdown

Author: PierreGauthier

src/Resources/views/Product/Index/_filters.html.twig

@@ -1,5 +1,5 @@
 {% if gally_filter_active %}
-<div class="ui fluid vertical menu">
+<div class="ui fluid vertical">
     <div class="four wide column">
         <div class="ui segment">
             <form method="get" action="{{ path('sylius_shop_product_index', {'slug': app.request.attributes.get('slug')}) }}" class="ui loadable form">