+ static void setBufferLastSeenMsg(BufferId id, const MsgId &msgId); // this is synced to core and other clients
+ static void removeBuffer(BufferId id);
+ static void renameBuffer(BufferId bufferId, const QString &newName);
+ static void mergeBuffersPermanently(BufferId bufferId1, BufferId bufferId2);
+ static void purgeKnownBufferIds();