Don't interfere with the GO button

With webkit and IE, the GO button is not available when the query
results are long strings (marseille, brussels, etc.) because they
overwrite its sensitivity area. This patch leaves the GO button alone
in its column.

www/templates/maposmatic/index.html

@@ -331,7 +331,7 @@ maps.{% endblocktrans %}</p>
         {{ form.bbox.errors }}
     </td></tr>
     <tr class="byadmin field">
-      <td colspan="2">
+      <td>
 	<ul id="result_nominatim_search">
 	</ul>
       </td>