fix: Sticky offset in nested AppLayout

[georgylobko]

Description

Keep table's sticky header within a nested AppLayout on scroll by resetting globalVars.stickyVerticalTopOffset and globalVars.stickyVerticalBottomOffset for nested layout.

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?

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.30%. Comparing base (7740586) to head (9ec6e73).

Files with missing lines	Patch %	Lines
src/app-layout/visual-refresh-toolbar/index.tsx	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3013      +/-   ##
==========================================
- Coverage   96.30%   96.30%   -0.01%     
==========================================
  Files         777      777              
  Lines       21878    21894      +16     
  Branches     7481     7476       -5     
==========================================
+ Hits        21070    21085      +15     
- Misses        755      801      +46     
+ Partials       53        8      -45     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.