* Refactor GradientStops to use struct-of-arrays and include midpoint
* Implement interaction and rendering
* Make color picker saturation-value color picking snap to original position and show both axis lines
Make color picker saturation-value color picking snap to original position and show both axis lines
* Add graphite:midpoint attribute to SVG exports
* Add graphite:midpoint parsing to SVG importer
691d965bcf