Set "Maximum age of fresh articles (in hours)" per feed

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That could be awesome if the Maximum age of fresh articles (in hours) option could be also set per feed. Like that, the Fresh articles view could be smarter. I mean it's make sense if new articles from a monthly updated blog or whatever stay in the Fresh articles view few days, but new articles from a news feed for example, with tens of daily updates, stay in it just for few hours.

I guess a plugin should do the trick.