Elevator Pitch

Add a matrix factor for jupyterlab 4.1.x, and gather findings here.

Motivation

In some demos, it was noted that new keyboard shortcut scopes for ArrowLeft and ArrowRight are no longer overloaded, and trigger awkward cell collapsing behavior.

Design Ideas

• add conda-forge/label/jupyterlab_beta
• add jupyterlab
• fix selector scopes
• update tests
• update docs
  • watch lite, maybe pull RTD builds
• ???