bug#10477: zap-to-char should allow picking from history

[jidanni]

zap-to-char should allow typing e.g., the up arrow to pick a recently used
character, and then RET.

Currently the only way is to type the actual character back in again!
Even if hard to type CKS!

Currently one gets 'Non-character input-event'.

It should work something like one can maneuver at M-x occur's 'List
lines matching regexp:' prompt.

So: if a-z etc. is pressed, then no RET should be required.

If any 'Non-character input-event' is pressed, then we should be able to
manipulate from a history list of recently zapped chars.

emacs-version "24.0.92.1"