private void RemoveFolder(object sender, RoutedEventArgs e)
{
List <String> foldersToRemove = new List <string>();
foldersToRemove.Add((sender as Button).CommandParameter as String);
this.openedAppFolders = AppFolder.findAndRemoveFolders(this.openedAppFolders, foldersToRemove);
this.refreshOpenedFolders();
}
