message: Don't re-notify about messages on browser refresh
  Don't notify unless the js-sdk state is SYNCING, otherwise we'll
  display notifications for messages that come in during the
  incremental between the js-sdk cached data and the present.
  Requires
  Fixes
diff: @@ -98,7 +98,7 @@ var Notifier = {
  MatrixClientPeg.get().on("Room.receipt", this.boundOnRoomReceipt);
  MatrixClientPeg.get().on("sync", this.boundOnSyncStateChange);
  this.toolbarHidden = false;
  - this.isPrepared = false;
  + this.isSyncing = false;
  },
  stop: function() {
  @@ -107,7 +107,7 @@ var Notifier = {
  MatrixClientPeg.get().removeListener("Room.receipt", this.boundOnRoomReceipt);
  MatrixClientPeg.get().removeListener('sync', this.boundOnSyncStateChange);
  }
  - this.isPrepared = false;
  + this.isSyncing = false;
  },
  supportsDesktopNotifications: function() {
  @@ -213,18 +213,18 @@ var Notifier = {
  },
  onSyncStateChange: function(state) {
  - if (state === "PREPARED" || state === "SYNCING") {
  - this.isPrepared = true;
  + if (state === "SYNCING") {
  + this.isSyncing = true;
  }
  else if (state === "STOPPED" || state === "ERROR") {
  - this.isPrepared = false;
  + this.isSyncing = false;
  }
  },
  onRoomTimeline: function(ev, room, toStartOfTimeline, removed, data) {
  if (toStartOfTimeline) return;
  if (!room) return;
  - if (!this.isPrepared) return; // don't alert for any messages initially
  + if (!this.isSyncing) return; // don't alert for any messages initially
  if (ev.sender && ev.sender.userId == MatrixClientPeg.get().credentials.userId) return;
  if (data.timeline.getTimelineSet() !== room.getUnfilteredTimelineSet()) return;
  