message: Monitoring Dashboards: Restore "Refresh Interval" dropdown label
  The label was accidentally dropped from the dev perspective version of
  the monitoring dashboards page.
diff: @@ -239,6 +239,13 @@ export const TimespanDropdown = connect(
  },
  )(TimespanDropdown_);
  +const PollIntervalDropdown_ = ({ interval, setInterval }) => (
  + <div className="form-group monitoring-dashboards__dropdown-wrap">
  + <label className="monitoring-dashboards__dropdown-title">Refresh Interval</label>
  + <IntervalDropdown interval={interval} setInterval={setInterval} />
  + </div>
  +);
  +
  export const PollIntervalDropdown = connect(
  ({ UI }: RootState) => ({
  interval: UI.getIn(['monitoringDashboards', 'pollInterval']),
  @@ -246,7 +253,7 @@ export const PollIntervalDropdown = connect(
  {
  setInterval: UIActions.monitoringDashboardsSetPollInterval,
  },
  -)(IntervalDropdown);
  +)(PollIntervalDropdown_);
  // Matches Prometheus labels surrounded by {{ }} in the graph legend label templates
  const legendTemplateOptions = { interpolate: /{{([a-zA-Z_][a-zA-Z0-9_]*)}}/g };
  @@ -491,12 +498,9 @@ const MonitoringDashboardsPage_: React.FC<MonitoringDashboardsPageProps> = ({
  </h1>
  <div className="monitoring-dashboards__options">
  <TimespanDropdown />
  - <div className="form-group monitoring-dashboards__dropdown-wrap">
  - <label className="monitoring-dashboards__dropdown-title">Refresh Interval</label>
  <PollIntervalDropdown />
  </div>
  </div>
  - </div>
  <div className="monitoring-dashboards__variables">
  {!_.isEmpty(boardItems) && (
  <VariableDropdown
  