Use renderInterface to render gender icons in twig

src/Bundle/ChillMainBundle/Resources/views/Gender/index.html.twig

@@ -16,7 +16,7 @@
                 <tr>
                     <td>{{ entity.id }}</td>
                     <td>{{ entity.label|localize_translatable_string }}</td>
-                    <td><i class="{{ entity.icon }}"></i></td>
+                    <td>{{ entity.icon|chill_entity_render_box }}</td>
                     <td>{{ entity.genderTranslation.value }}</td>
                     <td style="text-align:center;">
 						{%- if entity.active -%}