Highlight updated podcast subscriptions

[klint]

It could be useful to have a graphical identification of those podcast subscriptions which contain new episodes fetched by the last updates, until one views the content of that subscription. Then the mark is removed.
Ideally new episodes within the subscription could be highlighted as well. But that is less important imho.
Like with a different color or an "New" icon or so?

This would help identifying new episodes, within numerous subscriptions.

Thanks