NEO (must) support undo, say it to ZODB.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1796 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/Storage.py

@@ -106,7 +106,10 @@ class Storage(BaseStorage.BaseStorage,
         return self.app.undoLog(first, last, filter)
 
     def supportsUndo(self):
-        return 0
+        return True
+
+    def supportsTransactionalUndo(self):
+        return True
 
     def abortVersion(self, src, transaction):
         return '', []