Ensure Tabulator styler subset logic is not lost

[philippjfr]

Fixes #5822

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (39ec575) 82.41% compared to head (630d209) 72.23%.

Files	Patch %	Lines
panel/util/__init__.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5938       +/-   ##
===========================================
- Coverage   82.41%   72.23%   -10.18%     
===========================================
  Files         291      291               
  Lines       43055    43071       +16     
===========================================
- Hits        35485    31114     -4371     
- Misses       7570    11957     +4387     

Flag	Coverage Δ
ui-tests	?
unitexamples-tests	72.23% <66.66%> (+0.28%)	⬆️

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