message: DatePicker: added min-width properties for date & year to avoid jumps
diff: flex-direction: row;
  }
  +.DatePicker__day {
  + min-width: 68px;
  +}
  +
  .DatePicker__month {
  display: flex;
  flex: 1 0 auto;
  padding: 0 8px;
  }
  +.DatePicker__year {
  + min-width: 85px;
  +}
  +
  .DatePicker__month .Select {
  width: 100%;
  }
  