Description

not sure whether it's a bug or a usability issue, but:

• clicking once in the menu View → Table of Contents does show the TOC
• but clicking a second time does not hide the TOC

and btw same goes for View → Debugger Panel

Reproduce

use the menu entry twice

Expected behavior

I'd expect these 2 functions to behave as togglers, just like how the Show Header thing behaves;
otherwise newby users can only regain their real estate by reloading the page

Context

• Operating System and version: seen on macos and linux
• Browser and version: chrome 118

• Jupyter Notebook version:

jupyter --version
Selected Jupyter core packages...
IPython          : 8.17.2
ipykernel        : 6.26.0
ipywidgets       : not installed
jupyter_client   : 8.5.0
jupyter_core     : 5.5.0
jupyter_server   : 2.9.1
jupyterlab       : 4.0.7
nbclient         : 0.8.0
nbconvert        : 7.10.0
nbformat         : 5.9.2
notebook         : 7.0.6
qtconsole        : not installed
traitlets        : 5.13.0

no output in the browser console