trifacta/vega — pull request #206 by arvind (2014-08-06 06:28:28+00:00)
Title: Fix for #111

This brings click handling in line with the DOM: http://api.jquery.com/mouseup/

> If the user clicks outside an element, drags onto it, and releases the button, this is still counted as a mouseup event. This sequence of actions is not treated as a button press in most user interfaces, so it is usually better to use the click event unless we know that the mouseup event is preferable for a particular situation.