message: Support hours in relative time range selection
diff: @@ -13,7 +13,7 @@ import ControlHeader from '../ControlHeader';
  import PopoverSection from '../../../components/PopoverSection';
  const RELATIVE_TIME_OPTIONS = ['ago', 'from now'];
  -const TIME_GRAIN_OPTIONS = ['seconds', 'minutes', 'days', 'weeks', 'months', 'years'];
  +const TIME_GRAIN_OPTIONS = ['seconds', 'minutes', 'hours', 'days', 'weeks', 'months', 'years'];
  const propTypes = {
  animation: PropTypes.bool,
  