Add Cluster UI test

[lgrossma]

See: #3686

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.67%. Comparing base (da60441) to head (7297e9c).
Report is 221 commits behind head on main.

❗ Current head 7297e9c differs from pull request most recent head 98aa6b9. Consider uploading reports for the commit 98aa6b9 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4121       +/-   ##
===========================================
+ Coverage   32.37%   44.67%   +12.29%     
===========================================
  Files          85       88        +3     
  Lines        6505     7074      +569     
  Branches     1349     1477      +128     
===========================================
+ Hits         2106     3160     +1054     
+ Misses       4399     3914      -485     

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[vrubezhny]

Looks good to me. Thanks!