Override param.rx display accessor on import

[philippjfr]

Fixes #6409

[codecov]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 71.58%. Comparing base (7ebde29) to head (e8c5b5a).

Files	Patch %	Lines
panel/io/notebook.py	77.77%	2 Missing ⚠️
panel/config.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6470      +/-   ##
==========================================
+ Coverage   71.56%   71.58%   +0.02%     
==========================================
  Files         310      310              
  Lines       45996    45996              
==========================================
+ Hits        32917    32928      +11     
+ Misses      13079    13068      -11     

Flag	Coverage Δ
unitexamples-tests	71.58% <70.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

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