message: Fix update and restart button status and visibility (win)
diff: @@ -23,7 +23,9 @@ namespace TogglDesktop.ViewModels
  .ToPropertyEx(this, x => x.UpdateStatusText);
  }
  UpdateAndRestartCommand = ReactiveCommand.Create(UpdateAndRestart,
  - updateStatus.Select(status => status.DownloadStatus == Toggl.DownloadStatus.Done));
  + updateStatus
  + .Select(status => status.DownloadStatus == Toggl.DownloadStatus.Done)
  + .ObserveOnDispatcher());
  }
  public string VersionText { get; }
  