RE: feature/completions-highlight-modifications e3c5b99 3/6: Add completions-highlight-mode initial implementation.

[Drew Adams <drew.adams@oracle.com>]

Responding to some of what you say there, comparing
with Icicles, as food for thought.

With Icicles there are pair of keys for cycling
forward and backward: `down' and `up' arrows.

But you can also just continue to use `TAB' (which
completes, as usual), to cycle forward.  This is
handy.  When you want to cycle backward, use `up'.

[And no, `S-TAB' does not cycle backward.  In Icicles,
`S-TAB' and `TAB' act similarly, but provide different
kinds of completion.]
___

You say that such highlighting is limited to when
all candidates are visible in *Completions*.  That's
not the case in Icicles.  The current candidate, which
is the one that's highlighted, is always visible (if
*Completions* is shown).
___

In Icicles you need not show *Completions* to cycle
candidates.  Cycling still places candidates, one by
one, in the minibuffer.  (You can complete without
showing *Completions* by using `C-M-TAB' instead of
`TAB'.)