YearPicker does not highlight current year

[PoltP]

YearPicker does not highlight current year (as it is implemented via '--today' style for days).

Steps to reproduce:

1. Add showYearPicker property to component
2. Open DatePicker
3. Current year is not highlighted

Expected behavior:
I expect the current year should be highlighted or have an option to do it

[martijnrusschen]

Fixed by #2344 2344