Login dialog: usability bad when hinting to a soon expiring password

[sunweaver]

Whenever PAM notifies a user about a soon expiring password, the UI fails badly in being intuitive and users wonder what to do.

What happens is:

Login: ...
Password: ...

Then...

Log In

(Nothing else).

You can then use enter to proceed with login. No button offerered ("Continue login...") or the possibility to change the password.

This needs more love!