text: Title: [BUG]  "Scroll for ... more charts" not working
  Body: I'm using Jupyter Notebook 6.1.4 with Python 3.8.5 (default, Sep  3 2020, 21:29:08) [MSC v.1916 64 bit (AMD64)] and IPython 7.19.0.
  
  As soon I display my dataframe and click on "Toggle Pandas/Lux" button, I get the lux charts as expected but cannot find a way to see all of them. On the bottom right corner it's written "Scroll for 12 more charts >>" but nothing happen if I scroll, expand/collapse the cell or click on the right arrows.