msg actions: Consolidate types for our filters on messages.
msg actions: Consolidate types for our filters on messages.

These are just like the onPress handlers in the parent commit: the
arguments they're actually passed are all of the same type, and giving
a name to each subset of that type's properties which a particular
filter happens to use just makes more to read and understand.

vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile,vishwesh3/zulip-mobile