Re: vertical fido-mode

[Juri Linkov]

>> So in my opinion maybe we can provide the vertical mode in a simpler way
>> just improving icomplete-completions and some other small changes here 
>> and there. WDYT?
>
> It could also add a different way to "select" a previous or next
> completion: instead of rotating the list, move the highlight (and some 
> fringe indicator, maybe).

Or show vertical completions in the *Completions* buffer and use the
current icomplete keys to navigate the *Completions* list from the minibuffer.