Allow Disabling Deemphasizing of List Items

Personally, I want a CLEAN look of all items on a list. I don't really use lists to watch all items on them, but I see the use case for other people. Adding a toggle or something to enable/disable this feature would not only improve the customizability and usefulness of lists but also allow for further extension of this feature with custom criteria.

This does not only apply to lists, but also to other views