added another default button for default action

templates/gracedb/query.html

@@ -31,6 +31,7 @@ onload="document.search_form.query.focus();"
     </tr>
     <tr><td/><td>{% include "gracedb/query_help_frag.html" %}</td></tr>
   </table>
+  <input type="Submit" name="Submit" value="submit"/>
   <input type="Submit" name="ligolw" value="LigoLW"/>
 </form>