renderers/index.css: Adjust HTML table style
renderers/index.css: Adjust HTML table style

Port changes made to Jupyter notebook tables in Issue 2209 and Pull
Request 2231. Set the max-width to none so that libraries like Pandas
which want to set the max width can do it properly.

eskirk/jupyterlab,jupyter/jupyterlab,charnpreetsingh185/jupyterlab,eskirk/jupyterlab,jupyter/jupyterlab,charnpreetsingh185/jupyterlab,charnpreetsingh185/jupyterlab,eskirk/jupyterlab,charnpreetsingh185/jupyterlab,eskirk/jupyterlab,eskirk/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,charnpreetsingh185/jupyterlab,jupyter/jupyterlab