fix: Sass incompatible units

[georgylobko]

Description

Some packages in the build 7206966688 have failed because of the units incompatibility problem as shown below:

SassError: 1 and 0.25em are incompatible.
╷
1136 │ line-height: calc(1 + 0.25em + var(--border-divider-list-width-471u6a, 1px));
│ ^^^^^^^^^^

While this code works correctly in most packages, it fails in some packages, likely due to their Webpack configuration. To avoid this issue, wrap the problematic styles with string.unquote, which should resolve the problem.

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 96.44%. Comparing base (c357e20) to head (92abd47).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3221   +/-   ##
=======================================
  Coverage   96.44%   96.44%           
=======================================
  Files         790      790           
  Lines       22246    22249    +3     
  Branches     7575     7637   +62     
=======================================
+ Hits        21455    21458    +3     
  Misses        739      739           
  Partials       52       52           

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