private void Tvi_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
 {
     if (sender is TreeViewItem tvi)
     {
         string    thingLabel = LeftOfColon(tvi.Header.ToString()).Trim();
         ModuleUKS parent     = (ModuleUKS)base.ParentModule;
         if (parent.FindModuleByType(typeof(ModuleAudible)) is ModuleAudible mda)
         {
             mda.SpeakThing(thingLabel);
         }
         //textBox1.Text = LeftOfColon(tvi.Header.ToString());
         //Button_Click(null, null);
         e.Handled = true;
     }
 }