Improve Chrome App Mode experience

[PEERCRED]

In App Mode, Chrome is more tolerant to key interceptions.
For example, Ctrl-W works in a terminal as expected (deletes previous word) instead of closing the browser tab. But outside of a terminal it still closes the window.

I propose to intercept this (and some other) shortcut by default in JupyterLab with or without an action bound to it.

[jasongrout]

Thanks. Wouldn't it confuse users more if Ctrl-W didn't close the app, though?

What are the other keyboard shortcuts you think should be intercepted?

[PEERCRED]

Wouldn't it confuse users more if Ctrl-W didn't close the app, though?

IDK, but closing the current JupyterLab's tab instead of the whole browser window/tab would be more natural IMO.

What are the other keyboard shortcuts you think should be intercepted?

No other candidates now.

[jasongrout]

Note that you can always define such a keyboard shortcut to be captured (or even close the current tab, I think).