CTRL+SHIFT+Q shortcut for "Close and Shut Down Notebook" does not work

[JasonWeill]

On macOS Ventura 13.6.6 (22G630), with Firefox and Chrome, CTRL+SHIFT+Q appears in the File menu of Jupyter Notebook as a shortcut for "Close and Shut Down Notebook", but pressing this shortcut does not appear to do anything. In JupyterLab, this shortcut is bound to the same command, although the command is called "Close and Shut Down" in the File menu.

On Windows 10, with Firefox, pressing CTRL+SHIFT+Q immediately closes the browser and does not shut down Jupyter Notebook or JupyterLab.

Originally reported by @jph00 in jupyter/notebook#7041.

[JasonWeill]

In Edge on Windows 10, CTRL+SHIFT+Q does trigger a "Shut down the notebook?" dialog. Clicking the red "Ok" button does cause the open notebook to be closed, but JupyterLab continues to run.

[krassowski]

but JupyterLab continues to run.

I think it is meant to close the notebook and shut down the kernel, not the JupyterLab application.