icomplete-vertical feels strange

[Christopher Dimech]

I am testing icomplete-vertical-mode and its behaviour feels very strange.

It works the same as in icomplete-mode using "C-." (Next Choice) and
 "C-," (Previous Choice).

One thing I have noticed is that the current chice is not put adjacent to the
M-x command.

But in vertical mode, it feels more natural to use the up and down keys
for "Next Choice" and Previous Choice".  It is also more natural to press
enter to "Select Choice" instead of "C-j".

The way ivy does things is far more natural and easy.  Am convinced that
icomplete-vertical-mode suffers from serious problems and weirdness from
the user point of view.