No shortcut for 'clear console cells' option under edit menu.

[CrisBMoya]

Hello.

In JupyterLab, there's no shortcut to clear console cells, but there's an option under edit menu though. No way to map that one to a keyboard shortcut.

Current edit menu shortcuts are:

    // editmenu:undo
    // editmenu:redo
    // editmenu:clear-current
    // editmenu:clear-all
    // editmenu:go-to-line

And no one for 'clear console cells'

Thanks.