Add filtering to LinearApolloDisplay

[shashankbrgowda]

Fixes #450 (comment)

[garrettjstevens]

I've noticed that if a feature type is in the filtered list, but then is removed, the features of that type don't disappear immediately, you have to refresh the page. This is because those features are already in the seenFeatures and don't get removed. I don't think we should remove them from the seenFeatures, though.

Instead of of checking the filter in the afterAttach of layout.ts, I think it should be checked in the featureLayouts and featuresMinMax views. That way the features are still always loaded, just not always displayed, and changes to the filter should show up immediately without a page refresh.