fix(ui): improve layout and overflow handling in sheet bar menu

[jikkai]

close #3821

Pull Request Checklist

• Related tickets or issues have been linked in the PR description (or missing issue).
• Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• Unit tests have been added for the changes (if applicable).
• Breaking changes have been documented (or no breaking changes introduced in this PR).

[github-actions]

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Playwright test results

 16 passed
 1 flaky

Details

 17 tests across 8 suites
 4 minutes, 23 seconds
 e71454b
 For more information, see full report

Flaky tests

chromium › visual-comparison/sheets/sheets-visual-comparison.spec.ts › diff default sheet toolbar

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 31.92%. Comparing base (9630e31) to head (e71454b).
Report is 9 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #3823   +/-   ##
=======================================
  Coverage   31.92%   31.92%           
=======================================
  Files        2338     2338           
  Lines      120836   120836           
  Branches    26746    26746           
=======================================
  Hits        38575    38575           
  Misses      82261    82261           

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[wzhudev]

LGTM