text: Title: [BUG] Param "dark" not work
  Body: `dark` does not work in the current version. 
  It's worked well in older versions. I didn't change my code and just run an old notebook.
  I can only click the theme buttons to change the theme, and my choice won't be remembered.
  
  Name: pygwalker
  Version: 0.4.8.9
  
  Python 3.9 Jupyter Lab