[Backport] Fixed issue #22639: Without select attribute click on add attribute it display all selected when add attribute again.

[mahesh-rajawat]

Original Pull Request

#22724

Fixed issue #22639 in this PR.

Description (*)

Without select attribute click on add attribute it display all selected when add attribute again.
this issue fixed in this PR.

Fixed Issues (if relevant)

1. Without select attribute click on add attribute it display all selected when add attribute again. #22639
2. ...

Manual testing scenarios (*)

1. Go to Admin
2. Catalog >> Products >> Add New Product
3. Click on Add Attribute button
4. Without select any attribute click on add selected
5. It will close the popup window
6. Now click Add Attribute again
7. No attributes are selected now.

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)

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[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-5149 has been created to process this Pull Request

[VasylShvorak]

✔️ QA passed

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