@Override
    public void execute() {
      final DialogBox db = new DialogBox(false, true);
      db.setText("About MIT App Inventor");
      db.setStyleName("ode-DialogBox");
      db.setHeight("200px");
      db.setWidth("400px");
      db.setGlassEnabled(true);
      db.setAnimationEnabled(true);
      db.center();

      VerticalPanel DialogBoxContents = new VerticalPanel();
      HTML message =
          new HTML(
              MESSAGES.gitBuildId(GitBuildId.getDate(), GitBuildId.getVersion())
                  + "<BR/>Use Companion: "
                  + BlocklyPanel.getCompVersion()
                  + "<BR/><BR/>Please see "
                  + RELEASE_NOTES_LINK_AND_TEXT
                  + "<BR/><BR/>"
                  + termsOfServiceText);

      SimplePanel holder = new SimplePanel();
      // holder.setStyleName("DialogBox-footer");
      Button ok = new Button("Close");
      ok.addClickListener(
          new ClickListener() {
            public void onClick(Widget sender) {
              db.hide();
            }
          });
      holder.add(ok);
      DialogBoxContents.add(message);
      DialogBoxContents.add(holder);
      db.setWidget(DialogBoxContents);
      db.show();
    }
 /** @param height */
 public void setHeight(String height) {
   dialogBox.setHeight(height);
 }