Correct the loop through search engines

            <th>{{ _('Engine name') }}</th>

            <th>{{ _('Allow') }} / {{ _('Block') }}</th>

        </tr>

    {% for (categ,search_engines) in categs %}

        {% for search_engine in search_engines %}

    {% for categ in all_categories %}

        {% for search_engine in engines_by_category[categ] %}

            {% if not search_engine.private %}

            <tr>