Add missing REALTIME_POST_HIDE update for state.posts
Add missing REALTIME_POST_HIDE update for state.posts

For some reason, it was missing from the reducer. It caused the post
that being hidden in the other tab, to keep their old isHidden value
in the current tab, so it stayed visible (duplicated) in both
visibleEntries and hiddenEntries sections.

clbn/freefeed-gamma,clbn/freefeed-gamma,clbn/freefeed-gamma