private void OnFolderRefresh(object sender, string path)
        {
            FolderViewer folderViewer = sender as FolderViewer;

            Gtk.Application.Invoke(delegate {
                PeerSocket peer = P2PManager.KnownPeers[folderViewer.UserInfo] as PeerSocket;
                CmdManager.RequestFolder(peer, path);
            });
        }