fix: Constrain main content when content paddings are disabled in toolbar

[fralongo]

Description

Currently, when disableContentPaddings=true, the content of the toolbar goes behind the Split panel.

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

All modified and coverable lines are covered by tests ✅

Project coverage is 96.19%. Comparing base (a783fec) to head (af780f0).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2889      +/-   ##
==========================================
- Coverage   96.20%   96.19%   -0.01%     
==========================================
  Files         761      761              
  Lines       21447    21447              
  Branches     7276     6940     -336     
==========================================
- Hits        20633    20631       -2     
- Misses        761      808      +47     
+ Partials       53        8      -45     

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

[just-boris]

Why does this one require a special treatment?

I checked on the preview page, found no issues when overriding this to grid-column: 2 / 5;

[fralongo]

You are right, addressed!