Render categories properly

i2p2www/pages/global/macros

@@ -31,3 +31,10 @@
   {%- endif %}
   </div>
 {%- endmacro -%}
+
+{%- macro render_categories(categories) -%}
+{%- if categories and categories|length %}
+{%- for category in categories %}{{ category }}{% if not loop.last %}, {% endif %}{% endfor %}
+{%- else %}{{ _('None') }}
+{%- endif %}
+{%- endmacro %}