docs: protected String defaultActionHtmlContent() {
  
          StringBuffer result = new StringBuffer(2048);
          result.append("<form name=\"EDITOR\" id=\"EDITOR\" method=\"post\" action=\"").append(getDialogRealUri());
          result.append("\" class=\"nomargin\" onsubmit=\"return submitAction('").append(DIALOG_OK).append(
              "', null, 'EDITOR');\">\n");
          result.append(dialogContentStart(getDialogTitle()));
          result.append(buildDialogForm());
          result.append(dialogContentEnd());
          result.append(dialogButtonsCustom());
          result.append(paramsAsHidden());
          if (getParamFramename() == null) {
              result.append("\n<input type=\"hidden\" name=\"").append(PARAM_FRAMENAME).append("\" value=\"\">\n");
          }
          result.append("</form>\n");
          result.append(getWidgetHtmlEnd());
          return result.toString();
      }