If we call exclude_muting_conditions() with a non-stream
narrow, it will now include a condition to exclude streams
that are not in your home view. As of now, this code only
executes during testing, but it sets the stage for doing
better in:home queries on the back end.
(imported from commit bbd764bd0e9588a50e4a82c915e82a2c1b99d73e)
If we are already narrowing to a stream, then we can disregard
muted topics in all the other streams and create a simpler query
for the DB to execute.
(imported from commit 35a074a76eec99922034a381741355da3fdd5b39)
Due to the way we store muted topics, it is possible that a
muted topic stream name may no longer exist, and we need to
handle that case gracefully.
(imported from commit 4d18ec55e45213657a67e160848229678f212765)
Previously, we assumed that num_before or num_after would be always be non-zero
after adjustment for the anchor. However, we don't adjust num_before or
num_after when a narrow is specified.
(imported from commit 9239fef140e109b11bdfbeef42e9fbed78660ad1)
