Fixes related to is_grayed/muted
Corrected reputation boundary for is_grayed
(was marking way too many people) - original boundary was 1.0 but for logarithmic reputation value.
Fixed bridge_get_ranked_post_by_created_for_observer_communities
and bridge_get_ranked_post_by_muted_for_observer_communities
that use is_grayed
that were broken with recent commit.