[Forwardport] Fix for #15041 Adding a new fieldset to the admin category editor changes the position of the 'General' fieldset

[jignesh-baldha]

Original Pull Request

#17540

Description

When a custom fieldset is added to the admin category editor, the General section (the one with "Enable category", "Include in Menu" and "Category Name") moves to the last position of the form.
Full description in #15041

Fixed Issues (if relevant)

1. Adding a new fieldset to the admin category editor changes the position of the 'General' fieldset. #15041
   

Manual testing scenarios

Provided in #15041

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 @jignesh-baldha. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

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[magento-engcom-team]

Hi @jignesh-baldha. Thank you for your contribution.
We will aim to release these changes as part of 2.3.0.
Please check the release notes for final confirmation.