      <option value=''></option>
          <option value='bootstrap3'>Bootstrap 3</option>
          <option value='fontawesome3'>fontawesome 3</option>
          <option value='fontawesome4'>fontawesome 4</option>
          <option value='fontawesome5'>fontawesome 5</option>
          <option value='jqueryui'>jQuery UI</option>
          <option value='openiconic'>Open Iconic</option>
          <option value='spectre'>Spectre</option>
          <option value='bootstrap'>Bootstrap Icons</option>
        </s