Bind UIHandler to form buttons without an explicit type attribute

[jiripudil]

closes #397

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.75%. Comparing base (8beeb84) to head (eaadd79).

❗ Current head eaadd79 differs from pull request most recent head ca14015. Consider uploading reports for the commit ca14015 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #398      +/-   ##
==========================================
- Coverage   94.05%   93.75%   -0.30%     
==========================================
  Files          11       11              
  Lines        1295     1297       +2     
  Branches      176      181       +5     
==========================================
- Hits         1218     1216       -2     
- Misses         75       79       +4     
  Partials        2        2              

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