fix: Break words in split panel header

[gethinwebster]

Description

Allow long words in split panel header to be broken

Related links, issue #, if available: #1431

How has this been tested?

Local testing & updated screenshot test

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?

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (e657a92) 93.57% compared to head (0085847) 93.57%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1437   +/-   ##
=======================================
  Coverage   93.57%   93.57%           
=======================================
  Files         631      631           
  Lines       16897    16897           
  Branches     5583     5583           
=======================================
  Hits        15812    15812           
  Misses       1013     1013           
  Partials       72       72           

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