2207 - IdsDatePicker input value sync

[jdilag90]

Explain the details for making this change. What existing problem does the pull request solve?
Fixes issue where manual date inputs didn't sync with date picker value and picker popup

Related github/jira issue (required):
Closes #2207

Steps necessary to review your pull request (required):

1. Checkout branch
2. Go to http://localhost:4300/ids-date-picker/example.html
3. Enter a date manually
4. Check that $('ids-date-picker').value matches that date
5. Open popup and check that your input date is displayed and selected

Included in this Pull Request:

• Some documentation for the feature.
• A test for the bug or feature.
• A note to the change log.