bug#17497: 24.4.50; TTY menu glitches

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> > Curses applications behave differently if you type those
>> > three characters, one-by-one, because of timing.
>> We try pretty hard to avoid using such timeouts in Emacs, so by and
>> large this doesn't apply to Emacs at all.
> As it happens, that rule of thumb doesn't apply to terminals:
> https://github.com/mirrors/emacs/blob/master/src/keyboard.c
> (it's implemented there, at any rate)

Where do you see the timeouts?

Or rather, no, don't bother, because even there might be problem in how
we process the input escape sequences, these are unrelated to the
display glitches we see.  So let's focus on the display glitches.


        Stefan