Fix the cumulative line chart.

[kum-deepak]

It seems the cumulative line in the Pareto chart example is incorrect. Removing the sort in the fake group seems to fix it. Please review.

[gordonwoodhull]

The bars should be sorted from greatest to least, but they aren't taking the ordering from the group.

According to the screenshot, the example worked \ when I answered the question on SO, but already the fiddle does not work, so I don't know what happened.

This fixes it:

        .ordering(kv => -kv.value.value)

[kum-deepak]

Thanks, @gordonwoodhull! I have updated the code.

[kum-deepak]

The scatter-series example was showing the issue reported in #1772. Switching off mouseZoomable.

[gordonwoodhull]

Thanks @kum-deepak!