prevent certain keyboard shortcuts causing all work to be lost

[k-yle]

Closes #9398, Closes #10593

Currently, if you press 1, 2, 3, or N while drawing a way, all your hard work is lost :(

This PR allows modes to specify when they are disabled, which is already possible for actions.

The modes for adding a point/line/area/note are now disabled if you are in a drawing mode.

[tyrasd]

To make this for also work for the N keyboard shortcut, the is-disabled test needs to be performed in modules/ui/notes.js (line 37+) as well:

    context.keybinding().on(mode.key, function() {
        if (!enabled()) return;
        if (mode.disabled?.()) return;

Closes #10593

I cannot confirm this: neither the click of the commit button nor the Ctrl+S keyboard shortcut are disabled while drawing. Did you mean to link this issue to a different PR?