Fix inconsistent scrolling behavior on checkout step navigation

[mfickers]

Description (*)

This pr fixes inconsistent scrolling behavior when using the navigateTo function of the checkout step-navigator. Using $('body') as scrolling context does not work in every browser. This changes the selector to $('html, body') which is common practice to get the scrolling context for the whole page.

Related Pull Requests

This behavior was broken in this commit: 6c46def
as part of this pr #14270

Fixed Issues (if relevant)

1. Fixes Checkout navigation scrolling behavior inconsistent between browsers #35126

Manual testing scenarios (*)

1. Use Firefox browser
2. Add a product to cart and visit the checkout as a guest
3. Enter a valid email, shipping address and select a shipping method
4. Click on the 'Next' button to go to step 2 of the checkout
5. On the bottom right, click on the pencil icon next to the selected shipping method

Behavior before fix:

• Page will scroll to the shipping address form

Behavior after fix:

• Page will scroll to the shipping method list

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)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

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[torhoehn]

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[mfickers]

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[mfickers]

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[mfickers]

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