Mozilla has a printer settings object which we serialize when saving the settings...

Mozilla has a printer settings object which we serialize when saving the settings.  But those objects are not necessarily compatible across xulrunner versions.  This changeset will load what settings it can and warn the user that they need to reconfigure their printer settings.  We also attempt to load the printer settings up-front during the login process for earlier warning.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@14844 dcc99617-32d9-48b4-a31d-7c20da2025e4