Description

At the moment the Settings Editor doesn't seem to be mobile friendly.

Reproduce

Testing with JupyterLab4.0.0a22 with this gist:https://gist.github.com/jtpio/4e9a3d435d7c3950dc4150c10abbb1d7

Expected behavior

It should be possible to modify settings easily on devices with a narrower viewport.

Maybe the left menu should be made collapsible so the rest of the settings could be more easily scrolled via touch actions?

Context

This was also noticed when trying to add the Settings Editor to Notebook v7 injupyter/notebook#6316.