gnome-screensaver use circles in password field

[William Jon McCann <mccann jhu edu>]

Hi,

I'd like to make gnome-screensaver use a black circle as the "invisible" 
character in password fields instead of an asterisk [1]?  OS X and XP 
both do this.

Besides that I think it has some advantages:

  * It is cleaner (no edges)
  * It is easier to see (for a11y and on LCD screens in sunlight)
  * It isn't a character that is commonplace on most keyboards

The usability list seems to support this and some are surprised that we 
aren't using this already.

There is no i18n impact.

Thanks,
Jon

[1] http://bugzilla.gnome.org/show_bug.cgi?id=332053