tqt: Disable echoing if backspace is pressed first.
* tqt/secqlineedit.h (backspacePressed): New signal. * tqt/secqinternal.cpp (SecTQLineEdit::backspace): Emit new signal. * tqt/pinentrydialog.h (_got_input): New member field. (onBackspace): New slot. * tqt/pinentrydialog.cpp (onBackspace): New slot. (PinEntryDialog::updateQuality): Prevent echo disabling as soon as the text has been edited.
- GnuPG-bug-id: T3428
- Signed-off-by: Damien Goutte-Gattat <dgouttegattat@incenp.org>