[Backport] Fix: Cart is emptied when enter is pressed after changing product quantity

[lfluvisotto]

Original Pull Request

#21509

Description (*)

Fix: Cart is emptied when enter is pressed after changing product quantity

Fixed Issues (if relevant)

#21499: Cart is emptied when enter is pressed after changing product quantity

Manual testing scenarios (*)

Go to the input qty and press enter key

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 @lfluvisotto. Thank you for your contribution
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[lfluvisotto]

@magento-engcom-team give me test instance

[magento-engcom-team]

Hi @lfluvisotto. Thank you for your request. I'm working on Magento instance for you

[magento-engcom-team]

Hi @lfluvisotto, here is your new Magento instance.
Admin access: https://pr-21512.instances.magento-community.engineering/admin
Login: admin Password: 123123q

[lfluvisotto]

Hi @sidolov , @VladimirZaets , @sivaschenko

The PR made for the version 2.3.X was already merged.

#21509

Are you guys going to merge also this PR into 2.2.X ?

[sivaschenko]

Sure, thanks for notification @lfluvisotto !

[magento-engcom-team]

Hi @sivaschenko, thank you for the review.
ENGCOM-4630 has been created to process this Pull Request

[VasylShvorak]

✔️ QA passed

[m2-assistant]

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