The "test_filter_all" includes tests for muted and not muted topics,
but the 'is_spectator' field is set to 'true'.
Logically, it is incorrect because a topic can't have a
visibility policy set in spectator view.
This commit fixes the incorrect behavior and adds a separate test
for the case 'is_spectator=true'.
The issue was introduced in d0a697f.
narrow is a term that is intended to only apply to a message feed
view; it comes from "narrowing the set of messages you're looking
at from the All messages" so switching it to something different
makes sense.
Prakhar Pratyush
Anders Kaseorg
Aman Agrawal
evykassirer