negativeFillColor missing note about series.zones

[jszuminski]

Expected behaviour

Docs should clearly state that the negativeFillColor is overridden with series.zones - a similar note to the one which exists on series.negativeColor here:

Note that zones takes precedence over the negative color.

Demo: https://jsfiddle.net/BlackLabel/ejqpos1m/ (negativeFillColor is not applied, because series.zones are defined).

Reported

Originally reported by the user on the Highcharts forum.