invert the way List filter function behaves

[jenshu]

Currently in the *Set interfaces, you can pass in a filter function to the List. The way it currently works is that when the filter function returns true, the item is excluded from the list. Conventionally, a filter function should return true to include the item in the results, and false to exclude it.

We should consider changing how all the List filter functions are implemented, or possibly rename the function to something less confusing. If we make this change, we should do it across all our repos to be consistent (for example, SMH also defines some interfaces with a List function).

This would be a breaking change.