MetacatUI

This was a little trickier than I thought it would be because SVG elements are treated differently than other HTML elements by jQuery - notably when selecting and manipulating the classes of SVG elements. For example, I had to manually toggle the class names of SVG elements by manipulating the "class" attribute string value rather than using $el.toggleClass()

But now all labels on the donut charts are always visible and have better interaction on hover.