Bug: Zooming doesn't always focus on mouse

[ajmeese7]

In the demo, for whatever reason the feature of zooming in and out works perfectly based on where the cursor is located. Unfortunately, when in production and the zoomFit property is enabled, this no longer works.

The zoomFit isn't properly applied until the movement of all the nodes stops once they settle, and after zooming in the mousewheel scroll in/out is very choppy and throws the nodes way out of view instead of working as expected.