See https://bugs.freedesktop.org/show_bug.cgi?id=27788#c1 for details
about the problem this patch is solving
In particular, we should never bring up the dialog if there is no
password on the account. While this sounds like a weird corner case,
it's not.. the Live CD, for example, does not have a root password.
This also avoids the initial dialog resize.. before the patch the
authentication dialog appears and a split-second later an StEntry
widget is added.
Also print out more diagnostic information if showing the modal dialog
fails. Also add a comment about how to easily make this happen.
Signed-off-by: David Zeuthen <davidz@redhat.com>
adb04eb010