fix #4467 support for 4k/5k monitors

[BertKoor]

Bootstrap sets usable width to 52% for 5k monitors.

See forum discussion
https://www.webtrees.net/index.php/forum/help-for-release-2-1-x/39936-diagrams-how-to-set-to-use-the-entire-screen-width
and bootstrap code https://github.com/twbs/bootstrap/blob/main/site/data/breakpoints.yml

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.53%. Comparing base (e7a9d13) to head (0743207).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #5146   +/-   ##
=========================================
  Coverage     35.53%   35.53%           
  Complexity    11143    11143           
=========================================
  Files          1157     1157           
  Lines         47737    47737           
=========================================
  Hits          16961    16961           
  Misses        30776    30776           

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.