Update css_editor to resolve #2637

[froboy]

Original Issue, this PR is going to fix: #2637

Make sure these boxes are checked before asking for review of your pull request - thank you!

If there is a new feature or this is a bug fix - use 9.x-2.x branch. We'll tag for release if the bug is critical asap or tag for release next bug fix release until critical issue arrived.

Steps for review

• [ ] Ensure CSS Editor is enabled
• [ ] Go to Appearance > Theme > Edit
• [ ] Add custom CSS and check "Enable custom CSS"
• [ ] Save the form and observe the configuration stays enabled.

General checks

• [ ] All coding styles are fulfilled and there are no any issues reported by CodeSniffer. See Code of Conduct.
• [ ] Try to use Conventional commit messages accordingly to the standard https://www.conventionalcommits.org/en/v1.0.0/#specification
• [ ] Documentation has been updated according to PR changes.
• [ ] Steps for review have been provided according to PR changes.
  
• [ ] Make sure you've provided all necessary hook_update_N to support upgrade path.
• [ ] Make sure your git email is associated with account on drupal.org, otherwise you won't get commits there.
  
• [ ] If you would like to get credits on drupal.org, check documentation.

Thank you for your contribution!

[podarok]

This one is better and keeps history https://github.com/ymcatwincities/openy/pull/2639

[gundevel]

Refer to this link for build results (access rights to CI server needed): http://openy.cibox.tools:8080//job/PR_BUILDER_COMPOSER/3734/

Check Open Y Installation Wizard at http://install.openy.cibox.tools/build3734/install.php

[gundevel]

Open Y Upgrade Path site check installed at http://upgrade.openy.cibox.tools/build3734/

[gundevel]

Open Y Complete profile installed at http://profile.openy.cibox.tools/build3734/

[froboy]

Closing for #2639