yAxis extremes aren't correctly calculated

[Izothep]

Expected behaviour

yAxis extremes should be calculated using only visible data.

Actual behaviour

yAxis extremes are calculated using not only visible data, but also near points that are not visible in plotArea.

Live demo with steps to reproduce

http://jsfiddle.net/vRDNZ/2/

To reproduce show only one scatter point in chart using navigator.

It looks that this problem may be connected with this github topic: #3422

[KacperMadej]

Reopening due to the fix being reverted: b914777

[KacperMadej]

Works fine - v7.0.2.
Closing as resolved.
(Scatter doesn't require sorting and sorting is not forced in Highstock anymore)