Fixed an auto-completer issue, which it didn't match extra parameter correctly
Review Request #2447 — Created June 30, 2011 and discarded
By default, auto-completer used cache to match user's typed query. In general, it is good for performance. However, when extra parameter is used, auto-completer should talk to server to get the right result set, which means we should not use cache to match subset of query.
Manually tested.