FLUID-5397, FLUID-5394: Fixed for failures observed with pager+tooltip demos

Corrupt records in relay system caused failures in operating the model constraints after long sequences of changes ( > 2 ). Race conditions within jQuery UI tooltip widget would cause attempts to display widgets over nonexistent elements due to triggering of updateContent before old tooltips had been removed from the document after animation, or if the tooltip's owner was removed from the document before the event was serviced.