Per-folder "compact view" setting

[glaeh]

I think it would be useful to have the ability to toggle the "compact view" setting on a per-folder basis, rather than just globally. The reason is that some types of feeds lend themselves well to a continuous expanded scroll (images), while other (blogs, articles) are much easier to browser in compact view. Thoughts?

At the very least, I think it would be great to add a keyboard shortcut to toggle the "compact view" setting.