crash when minDate is later in the year than maxDate

[sproctor]

If minDate is 2000-05-20 and maxDate is 2023-01-04, the DateRangeIterator will never find a date in 2023, and setting up the year grid state will throw an exception. A simple fix is to use Jan 1 for the start and end days of the dateRangeByYear. We actually want a YearRange there, not a DateRange.

[sproctor]

You can see eca411c with the change from a DateRange to IntRange.

It's possible that stepping by month could have a similar bug if the day of month of the minDate is later than the day of month of the maxDate.