private void settingsToolStripMenuItem_Click(object sender, EventArgs e)
 {
     persistGuiSettings();
     using(var options = new SettingsDialog()) {
         if (DialogResult.OK == options.ShowDialog(this)) {
             snapshots.MaxHistory = Settings.Default.MaxSnapshots;
             bindSnapshots();
             updateSSLValidationHandler();
         }
     }
 }