[FIX] Column header quick click leads to ghost header

- Deleting action timer for delayed call of _onColumnMoveStart() on 
"mouseup" event solves that problem.

Change-Id: Ief2d6cbe12cc7dc1bf82ae29e0178efbf65b732b
CSS: 1482003236
Merge "[FIX] Column header quick click leads to ghost header"