[PATCH] emacs: jump: make multilevel keys do multilevel jump

[David Bremner]

Mark Walters <markwalters1009 at gmail.com> writes:

> notmuch jump allows the user to specify a key sequence rather than
> just a single key for its bindings. However, it doesn't show what has
> already been typed so it can be difficult to see what has
> happened. This makes each key press appear, and the jump menu reduce
> to the possible follow up keys.
>
> We also bind backspace (emacs symbol DEL) to go back up a level in the
> subjumpmaps, and to exit from the top level.

pushed to master

d