Add icon name

[ahuang11]

Closes #6401

[codecov]

Codecov Report

Attention: Patch coverage is 5.88235% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 71.57%. Comparing base (93b8d95) to head (47de775).

Files	Patch %	Lines
panel/tests/ui/widgets/test_icon.py	0.00%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6411      +/-   ##
==========================================
- Coverage   71.61%   71.57%   -0.05%     
==========================================
  Files         310      310              
  Lines       45841    45858      +17     
==========================================
- Hits        32831    32822       -9     
- Misses      13010    13036      +26     

Flag	Coverage Δ
unitexamples-tests	71.57% <5.88%> (-0.05%)	⬇️

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