Sort tasks under resource in the resource chart

[GoogleCodeExporter]

Sometimes it is convenient to see tasks assigned to a resource in the order of 
their end dates.

Discussion on the forum: 
http://forum.ganttproject.biz/view/20140324170745_7800k5zqyj78ziotka4jw5vm6#2

Original issue reported on code.google.com by dbarashev on 25 Mar 2014 at 11:06