In Calibre News view, how can you customize the view to visually group multiple news items from the same source?

For example, say you download daily from the the New York Times. You end up with multiple dated New York Times items in your News view; it gets cluttered over time. It would be handy to be able to create a custom view that groups all news items from the same source.

ETA: Here's a screenshot showing the problem of multiple dated entries from the same source. Calibre builds each daily download from a given source into an Epub and treats it like a separate book.