fixed bug #9629: override stringify date format to use java default format.

docs/changelog/7.x.x.txt

@@ -1,4 +1,5 @@
 7.6.11
+ - fixed #9629: override stringify date format to use java default format.
  - Added a switch to allow the use of non-WebGUI objects with the Workflow
    engine.
  - fixed #9579: initialize keyword field because get fills it in now due to a recent code change

www/extras/yui-webgui/build/form/datatable.js

@@ -91,6 +91,7 @@ WebGUI.Form.DataTable
             delete data.columns[ i ].editorOptions;
         }
 
+        YAHOO.lang.JSON.dateToString = function(d) { return d.toString(); }; /* this overrides the default stringify date format */
         return YAHOO.lang.JSON.stringify( data );
     };