fingerprint support is optional so we shouldn't try to start
fprintd upfront and croak if it fails.
https://bugzilla.gnome.org/show_bug.cgi?id=675006
(cherry picked from commit e333263fd646cee7b235e181db7dd96a6bf0735e)
js2-mode is no longer developed and we recommend js-mode these days,
so switch the modelines to specify that, and make them consistent
across all files.
https://bugzilla.gnome.org/show_bug.cgi?id=660358
This commit adds the ability to log in with a fingerprint instead
of a password (assuming the user is enrolled and fingerprint
isn't disabled via gsettings)
https://bugzilla.gnome.org/show_bug.cgi?id=657823