issue: https://linear.app/comm/issue/ENG-2794/make-it-possible-to-display-only-chats-from-a-given-community-in-the
Since D6458 the calendar filters reducer reacts to `updateCalendarCommunityFilter` and `clearCalendarCommunityFilter` actions. We want to be able to extract the thread IDs based on the filters these actions have set.
We also need to update `onScreenThreadInfos` to reflect that when a COMMUNITY calendar filter is set, no event from a chat chat from outside of the picked community is displayed / we cannot add an event to a chat outside of the picked community / etc.