For syndication feeds, this would be very nice. If we know that the XML literal
is XHTML, we should render it (in an iframe?). Otherwise, the feed will look bad
in the Tabulator.
Perhaps otherwise we should escape it and display it with inside a <pre> or its
CSS equivalent or in a popup with the same.
It's more than a bug because it's a part of the spec that's not supported. It's
not really urgent, though. It's not critical... I think we need to customize the
severity and add a new Priority field for Tim or you. I haven't looked into this
yet.