<div class="left-sidebar">
  {{ make_tab_item('problem', 'fa fa-list', url('internal_problem'), _('Problem')) }}
  {{ make_tab_item('request_time', 'fa fa-angle-right', url('internal_request_time'), _('Average speed')) }}
  {{ make_tab_item('slow_request', 'fa fa-asterisk', url('internal_slow_request'), _('Slow requests')) }}
</div>