gtk: Disable echoing if backspace is pressed first.

Authored by Damien Goutte-Gattat via Gnupg-devel <gnupg-devel@gnupg.org> on Aug 4 2018, 11:24 PM.

Description

gtk: Disable echoing if backspace is pressed first.

* gtk+-2/pinentry-gtk-2.c (backspace_handler): New callback.
(create_window): Attach previous callback to "backspace" signal.
  • GnuPG-bug-id: T3428
  • Signed-off-by: Damien Goutte-Gattat <dgouttegattat@incenp.org>