Obsolete classes in the preferences registry

    in a work image I found that the following classes are obsolete:

self systemNavigation obsoleteClasses {AnObsoleteHaloThemePreferenceView . AnObsoleteBooleanPreferenceView}

Inspecting and chasing pointers the references to both are through PreferenceRegistryView's registries.  This is probably due to Monticello being unable to express class renames.  In any case the registry should be repopulated with non-obsolete classes, perhaps through a suitable Monticello package postscript.