Sluggish scroll with mouse's scrollwheel on zoomed in/out page

[rmdwirizki]

If we zoom in/out a page (using ctrl++ or ctrl--), and navigating it using mouse's scrollwheel or keyboard's arrow will result in very slow and sluggish scrolling experience

[gelevanog]

Try wrap these lines with setTimeout

https://github.com/asvd/syncscroll/blob/master/syncscroll.js#L107
https://github.com/asvd/syncscroll/blob/master/syncscroll.js#L120