Re: [PATCH] `completing-read`: Add `group-function` support to completion metadata

[Stefan Monnier]

> So it's better if at least icomplete-mode is enabled, preferably with an
> option which shows the completions right away with no input. And the
> vertical style should be even better.

Maybe we could accommodate this in the default UI by adding an option to
eagerly popup the *Completions* buffer (and keep it updated as long as
it's displayed) and to keep it disabled by default but make it possible
to enable it via completion-category-(overrides|defaults).


        Stefan