fix(button-dropdown): remove the default style and side effects under webkit

[unix]

Checklist

• Fix linting errors
• Tests have been added / updated (or snapshots)

Change information

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[codecov]

Codecov Report

Merging #742 (0223bdb) into master (ccb839c) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 0223bdb differs from pull request most recent head 2e43db6. Consider uploading reports for the commit 2e43db6 to get more accurate results

@@            Coverage Diff             @@
##           master     #742      +/-   ##
==========================================
- Coverage   98.85%   98.85%   -0.01%     
==========================================
  Files         198      198              
  Lines        3046     3045       -1     
  Branches      669      669              
==========================================
- Hits         3011     3010       -1     
  Misses         34       34              
  Partials        1        1              

Impacted Files	Coverage Δ
components/css-baseline/css-baseline.tsx	100.00% <ø> (ø)
components/button-dropdown/button-dropdown.tsx	100.00% <100.00%> (ø)

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