Makes ILabShell optional in toc extension (#11420)
Makes ILabShell optional in toc extension (#11420)

* Makes ILabShell optional in toc extension

* Moves labShell parameter below translator per @jtpio, makes optional

* Runs prettier manually
jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab