Features: - Add event banners from urls. - Add ActivityPub support for UserCommunicationChannels. Fixes: - Fix predicates for assemblies. - Hide official assembly names on events. - Fix artifact in footer. - Fix room order when official order is given. - Fix RedeemTokenDetailView - Fix wiki - Diff display with no line numbers - Incorrect lock warning for new pages Removals: - Channels Feature - Workadventure Feature