Fix by @csuwldcat + some optimization done by me.
Fixed bad logic in Fx.Scroll that failed to account for existing scro…
…ll offsets and offests that are larger than the element's right edge coordinates
Optimize Fx.Scroll:toElementEdge a little
I suspect toElementCenter has the same issue: https://mootools.lighthouseapp.com/projects/24057/tickets/538-toelementcenter-scrolls-to-incorrect-position
I have a small fix for it (see http://jsfiddle.net/woomla/h9eTx/6/). But I think it is because getPosition is changed in 1.3. I can't tell if getPosition should be fixed or toElementCenter.