authPrompt: Notify error messages in GDM login/unlock
The announcement API in old versions of GTK doesn't work as in modern ones, and an announcement can be "eclipsed" by the normal message from a widget receiving the focus.
The way to fix this is to also deliver the message when the password entry receives the focus.
This only happens in Noble; in Plucky it works as expected.
The Ubuntu bug is the same than the original bug.
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2115948
Edited by Sergio Costas