Make task sorting more logical and attractive.  Refs #8947.
Make task sorting more logical and attractive.  Refs #8947.

Sort by end date with start date as a tie breaker.

git-svn-id: 2159781fc7c14c6bdd1f7e265daf7a25099c31e7@10387 7322e99d-02ea-0310-aa39-e9a107903beb

trac-hacks/trac-jsGantt,trac-hacks/trac-jsGantt,trac-hacks/trac-jsGantt