Feature: origami-backward-fold-outer-level

[jplindstrom]

A common and extremely useful navigation is to back out of the current folding level.

In the similar outline-mode, this is outline-up-heading.

I would love to see this in origami.

[gregsexton]

I have something like this bound to a key, does this work?

(lambda nil
  (interactive)
  (or
   (call-interactively 'origami-backward-fold-same-level)
   (call-interactively 'origami-previous-fold)))