message: Optimize CalendarHeader to not rerender if current month wasn't changed
diff: @@ -143,7 +143,15 @@ export const styles = (theme: Theme) =>
  },
  });
  +const MemoCalendarHeader = React.memo(
  + CalendarHeader,
  + (prevProps, nextProps) =>
  + nextProps.utils.isEqual(prevProps.currentMonth, nextProps.currentMonth) &&
  + prevProps.utils === nextProps.utils &&
  + prevProps.theme === nextProps.theme
  +);
  +
  export default withStyles(styles, {
  withTheme: true,
  name: 'MuiPickersCalendarHeader',
  -})(withUtils()(CalendarHeader));
  +})(withUtils()(MemoCalendarHeader));
  