Draggable: Fixes revert speed on sortable being set incorrectly

Draggable: Revert flag honours Sortable revert speed. Fixed: #9103 draggable: sets sortable revert speed to true.

Ticket: http://bugs.jqueryui.com/ticket/9103
Bug Demo: http://jsfiddle.net/surmston/6XQRN/3/