PR#7903 correct the position of the datepicker when you scroll

[saphaljha]

Original Pull Request: #16776

Description (*)

Fixed Issues (if relevant)

1. Datepicker does not scroll #7903: Datepicker does not scroll

Manual testing scenarios (*)

N/A

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @saphaljha. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
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[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-3872 has been created to process this Pull Request

[ghost]

Hi @saphaljha, thank you for your contribution!
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