jquery/jquery-ui — pull request #820 by jpka (2012-11-14 01:15:16+00:00)
Title: Slider: when handles overlap, clicking and dragging will now pick the last...

...one that was moved. Fixed #3467 - Sliders Handles can overlap, only small sliver of slider is selectable

Turns out the z-index didn't have anything to do with how handles are picked upon mouse click, so I just stored the last one moved, and on _mouseCapture, if they overlap, the last one moved wins. It's a minimal change and it works. I also removed the #3736 fix because it becomes irrelevant with this change.