message: Add Monitoring Silences to the sidebar
diff: @@ -284,9 +284,10 @@ const ClusterPickerNavSection = connectToFlags(FLAGS.OPENSHIFT)(({flags}) => {
  const MonitoringNavSection_ = ({urls, closeMenu}) => {
  const prometheusURL = urls[MonitoringRoutes.Prometheus];
  const grafanaURL = urls[MonitoringRoutes.Grafana];
  - return window.SERVER_FLAGS.prometheusBaseURL || prometheusURL || grafanaURL
  + return window.SERVER_FLAGS.prometheusBaseURL || window.SERVER_FLAGS.alertManagerBaseURL || prometheusURL || grafanaURL
  ? <NavSection text="Monitoring" icon="pficon pficon-screen">
  - {window.SERVER_FLAGS.prometheusBaseURL && <HrefLink href="/monitoring" name="Alerts" onClick={closeMenu} />}
  + {window.SERVER_FLAGS.prometheusBaseURL && <HrefLink href="/monitoring/alerts" name="Alerts" onClick={closeMenu} />}
  + {window.SERVER_FLAGS.alertManagerBaseURL && <HrefLink href="/monitoring/silences" name="Silences" onClick={closeMenu} />}
  {prometheusURL && <HrefLink href={prometheusURL} target="_blank" name="Metrics" onClick={closeMenu} isExternal={true} />}
  {grafanaURL && <HrefLink href={grafanaURL} target="_blank" name="Dashboards" onClick={closeMenu} isExternal={true} />}
  </NavSection>
  