message: Monitoring: Remove list page tabs
  Both Alerts and Silences are now listed in the sidebar, so we don't need
  the tabs and removing them makes the style more consistent with other
  list pages.
diff: @@ -647,7 +647,7 @@ const MonitoringListPage = connect(filtersToProps)(class InnerMonitoringListPage
  }
  render () {
  - const {CreateButton, data, filters, Header, loaded, loadError, match, PageDescription, reduxID, Row, rowFilter, textFilterLabel} = this.props;
  + const {CreateButton, data, filters, Header, loaded, loadError, PageDescription, reduxID, Row, rowFilter, textFilterLabel} = this.props;
  return <React.Fragment>
  <Helmet>
  @@ -660,15 +660,6 @@ const MonitoringListPage = connect(filtersToProps)(class InnerMonitoringListPage
  </div>
  </h1>
  </div>
  - <ul className="co-m-horizontal-nav__menu">
  - <li className={classNames('co-m-horizontal-nav__menu-item', {'co-m-horizontal-nav-item--active': match.path === AlertResource.path})}>
  - <Link to={AlertResource.path}>Alerts</Link>
  - </li>
  - <li className={classNames('co-m-horizontal-nav__menu-item', {'co-m-horizontal-nav-item--active': match.path === SilenceResource.path})}>
  - <Link to={SilenceResource.path}>Silences</Link>
  - </li>
  - <li className="co-m-horizontal-nav__menu-item co-m-horizontal-nav__menu-item--divider"></li>
  - </ul>
  <div className="co-m-pane__filter-bar co-m-pane__filter-bar--with-help-text">
  {PageDescription && <div className="co-m-pane__filter-bar-group co-m-pane__filter-bar-group--help-text">
  <PageDescription />
  