0.8dev: Applied workaround to hide the datepicker `div` at the bottom of the page. Refs #648.

The workaround can be removed after upgrading to jQuery UI 1.9.


git-svn-id: https://svn.apache.org/repos/asf/bloodhound/trunk@1517466 13f79535-47bb-0310-9956-ffa450edef68