Re: feature/icomplete-vertical

[Ergus]

Hi:

I made some corrections to simplify the icomplete-vertical feature
branch and pushed (forced) some days ago. (sorry for that, I should have
used a scratch branch instead)

Now the icomplete-format variable is removed and the user only needs to
add at least one '\n' to the separator. I also use
window-text-pixel-size to correct the issue with long lines but still
perform the height calculations in pixels to properly show the ellipsis
as Eli recommended.

I keep the funcall approach because IMO it is cleaner, and reduces
unneeded and redundant things. (And because it is compatible with
something else I am working in)

If some of the previous testers could give it a second try. When it is
fine I will add some documentation and merge in master.

BTW: If someone could give a look to the completions-highlight feature
branch too and make recommendations, report issues?

Best,
Ergus