don't let util.error create sound objects (trying to reduce proliferation of such...

don't let util.error create sound objects (trying to reduce proliferation of such objects for easier debugging), and give fancy_prompt the ability to handle its own sounds, to prevent blocking of sounds due to the modal window dialog.  Have util.error and util.network make fancy_prompt do this

git-svn-id: svn://svn.open-ils.org/ILS/trunk@16295 dcc99617-32d9-48b4-a31d-7c20da2025e4