Hovering broken for hidden data series

Created by: unclejustin

When toggling the visibility of a data series on an insight to "hidden" it's still rendered, just set to opacity 0. Because of this it messes up the "nearest point" hover affect as shown in the video below.

We probably have to actually update the array (which we were trying to avoid) and remove the invisible series.

https://user-images.githubusercontent.com/1855233/171299690-6bef1961-4ab7-40ee-ad15-ac7ab0240264.mov