DISCOVER-able items break the queue widget

When the build queue widget renders for an anonymous user, and default view includes some DISCOVER-able jobs, rendering fails with WARNING: Caught exception evaluating: it.queueItems. Reason: java.lang.reflect.InvocationTargetException

evaluating queueItems, ListView.getItems() iterates on job names and calls getItem(name). This one check for DISCOVER and throws an AccessDeniedException that isn't caught, resulting in some null value passed to jelly.