/// <summary>
 /// React to changes in internet connectivity
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 void Connectivity_ConnectivityChanged(object sender, ConnectivityChangedEventArgs e)
 {
     IsNotConnected = e.NetworkAccess != NetworkAccess.Internet;
     LogoutCommand.RaiseCanExecuteChanged();
     SyncCommand.RaiseCanExecuteChanged();
     DeleteProjectCommand.RaiseCanExecuteChanged();
 }