private void AddConfigurationButton_Click(object sender, RoutedEventArgs e)
        {
            AppConfiguration      configuration         = new AppConfiguration();
            ConfigurationEditForm configurationEditForm = new ConfigurationEditForm();

            configurationEditForm.BindControls(configuration);
            if (configurationEditForm.ShowDialog(this, "Add Configuration") == true)
            {
                AppConfigurations.Add(configuration);
                ConfigurationsManager  configurationsManager  = new ConfigurationsManager();
                ConnectorExplorerState connectorExplorerState = new ConnectorExplorerState();
                configurationsManager.SaveExplorerState(configuration, connectorExplorerState);
                RefreshAppConfigurationsListBox();
            }
        }