Squashed commit of the following:

commit d78b0c901d6ac8be2e9f78462cc20c0077988bde
Author: Savva Kolbechev <s.kolbachev@gmail.com>
Date:   Fri Oct 17 13:32:29 2014 +0300

    CAY-1962 | Implement CayenneTable column resize on double-click on the header separator