I haven't tested this at all, but could this line be replaced by a [`core.synchronizeScroller(element)`](https://github.com/taitems/jQuery.Gantt/blob/7038cec5de44c6c212b2f03611c4cc2f3b045b56/js/jquery.fn.gantt.js#L1376-1395), or is everything done in [`scrollPanel()`](https://github.com/taitems/jQuery.Gantt/blob/7038cec5de44c6c212b2f03611c4cc2f3b045b56/js/jquery.fn.gantt.js#L1357-1373) necessary? I'm thinking of putting this into a new pull request (unless, of course, you want to).