matrix-react-sdk

95b40a97 - Replace sdkReady with firstSyncPromise, add mx_last_room_id

Replace sdkReady with firstSyncPromise, add mx_last_room_id - Create a promise that will serve as a lock to be blocked on by things that need to wait for the first sync before accessing state. - Use this promise to block `view_room` calls until a sync has occured instead of just dropping them silently if the sync hasn't happened yet. - Store the current room ID in a localStorage item `mx_last_room_id` when `view_room` fires. This persists the last viewed room ID so that it can be restored on refresh, browser quit. This replaces the previous logic which set the room following a sync based on the most recent unread room.