code: protected String defaultActionHtmlContent() {
  
          StringBuffer result = new StringBuffer(2048);
          result.append("<form name='");
          result.append(getList().getId());
          result.append("-form' action='");
          result.append(getDialogRealUri());
          result.append("' method='post' class='nomargin'");
          if (getList().getMetadata().isSearchable()) {
              result.append(" onsubmit=\"listSearchAction('");
              result.append(getList().getId());
              result.append("', '");
              result.append(getList().getMetadata().getSearchAction().getId());
              result.append("', '");
              result.append(getList().getMetadata().getSearchAction().getConfirmationMessage().key(getLocale()));
              result.append("');\"");
          }
          result.append(">\n");
          result.append(allParamsAsHidden());
          result.append("\n");
          getList().setWp(this);
          result.append(getList().listHtml());
          result.append("\n</form>\n");
          return result.toString();
      }
docs: Returns the html code for the default action content.<p>
  
  @return html code