Bug#252109: some improvements

[Christian Perrier <bubulle@debian.org>]

Quoting Giuseppe Sacco (eppesuig@debian.org):
> I just downloaded and tested the netinstall image for i386 from
> http://cdimage.debian.org/pub/cdimage-testing/sid_d-i/
> and installed Debian.
> 
> In any field, I did type '/' and any other "normal" characters without
> problem, while, if I use 'ò' or other "strange" chars then the input is
> blocked and you may only press TAB to select 'back' and then reenter the
> form.


Yeah. Or hitting Ctrl-A also "unlocks" the display.

I just have put Alastair McKinstry in the loop for trying to sort this
nasty thing out.