startDate prop does not work if date picker is quarter

[kastetcs95]

Describe the bug
When date picker is quarter, model value is null (not set), so startDate prop does not work.

To Reproduce
Steps to reproduce the behavior:

1. Set quarter type for date picker.
2. Set startDate prop as new Date('2023-01-01').
3. Model value should be null (not set).
4. Open date picker via click to input.
5. Observe calendar, it is opened to current date, not 2023 year.

Expected behavior
Calendar should be opened to startDate prop.

Desktop & mobile (please complete the following information):

• Browser: Chrome
• Library version: 10.0.0