Add prefix and suffix variables to form elements.

[joshua-salsadigital]

civictheme/monorepo-drupal#1306

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• I have formatted the subject to include the issue number
  as [#123] Verb in past tense with a period at the end.
• I have provided information in the Changed section about WHY something was
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Changed

1. Added fix to support Form element prefix & suffix.

Screenshots

[github-actions]

🚀 Deployed on https://6719e57be5e76e70bc610282--civictheme-uikit.netlify.app

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 13.87%. Comparing base (85a6912) to head (7232aba).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #413   +/-   ##
=======================================
  Coverage   13.87%   13.87%           
=======================================
  Files          27       27           
  Lines        1290     1290           
  Branches      307      307           
=======================================
  Hits          179      179           
  Misses        894      894           
  Partials      217      217           

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[richardgaunt]

Thanks @joshua-salsadigital nice fix