void map_default_start_Click(object sender, RoutedEventArgs e)
 {
     if (this.activeMap != null)
     {
         DefaultLocationDialog dialog = new DefaultLocationDialog(this.activeMap.GetValue("default_start"), this.activeMap.GetValue("start_locations") ?? "");
         dialog.ShowDialog();
         this.activeMap.SetValue("default_start", dialog.FinalValue);
     }
 }
 void map_default_start_Click(object sender, RoutedEventArgs e)
 {
     if (this.activeMap != null)
     {
         DefaultLocationDialog dialog = new DefaultLocationDialog(this.activeMap.GetValue("default_start"), this.activeMap.GetValue("start_locations") ?? "");
         dialog.ShowDialog();
         this.activeMap.SetValue("default_start", dialog.FinalValue);
     }
 }