In revious diff (D6968) I added to redux state information about the community selected in the Chat tab. This diff adds logic that handles that filed in the reducer, and actions that can be
performed on it. we need to be albe to set the id, and clear it.
issue: https://linear.app/comm/issue/ENG-3176/make-pressing-a-drawer-item-in-chat-tab-filter-available-chats