I'm playing around with adding atomic window support to Gnus, so that
help/completion/other-pop-up buffers don't end up squished between the
*Summary* and *Article* windows, but instead shift the whole window
composition over temporarily.

All of Gnus' window configuration goes through one function,
`gnus-configure-windows', so it's relatively easy to target. The patch
below seems to do the trick.

My question is about quitting/removing atomic window compositions. Gnus
switches through many different compositions, so it's necessary to be
able to quit atomic windows. As you can see in the diff, I've had to
manually, and recursively, remove the 'window-atom parameter before
reconfiguring windows.

Is that the way it's supposed to work? I guess I would have thought
there would be an easier way of getting rid of an atomic
configuration -- like `quit-window' in any of the windows would quit all
of them, or something like that. Instead, `quit-window' seems to just
signal an error.

Is this how it's supposed to work? Should I be doing this differently?