message: Monitoring Dashboards: Fix Refresh Interval when `Off` is selected
  The `Off` text was not being displayed.
diff: @@ -254,7 +254,7 @@ const PollIntervalDropdown_: React.FC<PollIntervalDropdownProps> = ({
  items={pollIntervalOptions}
  label="Refresh Interval"
  onChange={onChange}
  - selectedKey={formatPrometheusDuration(pollInterval)}
  + selectedKey={pollInterval === null ? pollOffText : formatPrometheusDuration(pollInterval)}
  />
  );
  };
  