YearPicker is not applying --keyboard-selected when there is no default selected date passed

[balajis-qb]

Describe the bug

YearPicker view is not applying the class --keyboard-selected when we didn't pass selected date to it.

To Reproduce
Steps to reproduce the behavior:

() => {
  return <DatePicker showYearPicker dateFormat="yyyy" />;
};

When the pass selected prop with a valid date, it's applying --keyboard-selected to the navigated day.

Expected behavior
Like normal date picker view, we need to apply --keyboard-selected class irrespective of the availability of selected date.

[balajis-qb]

I'll work on the fix