allow the initial value of a property to contain unicode characters

lib/python/OFS/dtml/properties.dtml

@@ -247,7 +247,7 @@ property and click the "Add" button.
   </div>
   </td>
   <td colspan=2 align="left" valign="top">
-  <input type="text" name="value:utf8:string" size="30" />
+  <input type="text" name="value:utf8:ustring" size="30" />
   </td>
   <td align="right" valign="top">
   <div class="form-element">