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[gethinwebster]

• feat: Additional content slot in Collection Preferences
• Fix test-utils, rename additionalContent to contentBefore and update documentation
• Update test-util function name and CSS classname

Description

Related links, issue #, if available: n/a

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.40%. Comparing base (049115b) to head (937f66b).

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #3128    +/-   ##
========================================
  Coverage   96.40%   96.40%            
========================================
  Files         784      784            
  Lines       22128    22130     +2     
  Branches     7585     7183   -402     
========================================
+ Hits        21333    21335     +2     
  Misses        788      788            
  Partials        7        7            

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