private void ComboBoxAvailableServers_SelectedIndexChanged(object sender, EventArgs e)
        {
            int           i    = ComboBoxAvailableServers.SelectedIndex;
            ServersConfig cnf  = ServersConfig.GetInstance();
            ServerDetails serv = cnf.GetServerDetailsByIndex(i);

            if (serv == null)
            {
                return;
            }
            cnf.SetSelectedByIndex(i);
            ReposConfig rcnf = ReposConfig.GetInstance();
            RepoDetails repo = rcnf.GetSelected();

            if (repo == null)
            {
                return;
            }
            repo.SetServer(cnf.GetSelected().GetName());
        }