{% block titles %}
    <tr class="grid-row-titles">
        <th class="list row">
            {% for column in grid.columns %}
                {% if column.visible(grid.isReadyForExport) %}
                    {% if column.renderBlockId=='subject' %}
                        <div class="col-md-5">
                            <a class="order" href="{{ grid_url('order', grid, column) }}" title="{{ 'Order by'|trans }} {{ column.renderBlockId }}">Asunto</a>  
                        </div>
                    {% elseif column.renderBlockId=='numRead' %}
                        <div class="col-md-1">
                            <a class="order" href="{{ grid_url('order', grid, column) }}" title="{{ 'Order by'|trans }} {{ column.renderBlockId }}">Leídas</a>  
                        </div>
                    {% elseif column.renderBlockId=='isSended' %}
                        <div class="col-md-2 text-center">
                            <a class="order" href="{{ grid_url('order', grid, column) }}" title="{{ 'Order by'|trans }} {{ column.renderBlockId }}">Enviada?</a>  
                        </div>
                    {% elseif column.renderBlockId=='numTotal' %}
                        <div class="col-md-2 text-center">
                            <a class="order" href="{{ grid_url('order', grid, column) }}" title="{{ 'Order by'|trans }} {{ column.renderBlockId }}">Enviadas</a>  
                        </div>
                    {% elseif column.renderBlockId=='actions' %}
                        <div class="col-md-2 text-center">
                            Acciones
                        </div>
                    {% endif %}
                {% endif %}
            {% endfor %}
        </th>
    </tr>
{% endblock %}