refactor: Better Styles for wx and jupyter widgets

[tlambert03]

Jupyter

before

after

wx

before

after

[codecov]

Codecov Report

Attention: Patch coverage is 87.87879% with 4 lines in your changes missing coverage. Please review.

Project coverage is 71.85%. Comparing base (528e71b) to head (287be3d).
Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ndv/views/_jupyter/_array_view.py	78.94%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
+ Coverage   70.45%   71.85%   +1.39%     
==========================================
  Files          44       44              
  Lines        4255     4274      +19     
==========================================
+ Hits         2998     3071      +73     
+ Misses       1257     1203      -54     

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