private void ShowDropboxFilesView(object obj)
        {
            if (_fileListView == null)
            {
                _logger.Info("show file list view");
                _fileListView = Container.Resolve<FileListView>();
                var viewModel = (FileListViewModel) _fileListView.DataContext;
                viewModel.CloudService = FileListViewModel.CloudServiceType.Dropbox;

                _fileListView.Show();
            }
            else
            {
                _logger.Warn("file list view already open");
                _logger.Info("push view in foreground");

                _fileListView.Focus();
            }
        }
 private void OnFileListViewClosedMsg(FileListViewClosedMsg msg)
 {
     _logger.Info("set file list view to null");
     _fileListView = null;
 }