It seems the pointIndex is incorrect for a fastlineseries chart. could also be for all charts. but it seems to return a wrong value for args.pointindex. it doesnt seem different than the args.pointindexviewport value. if i hide a series by clicking on the legend the args.pointindex should not give me what the viewport gives me. for example if i have 2 series in a chart and the first series has the first 3 points on the chart that is pointindex 1,2,3 and the 2nd series has points 4,5 and 6. pointindex 4,5, and 6. if i hide the first series, and click on the series 2 point 4, (which now shows as the first point on the chart) the pointindex should still be 4, its not... it shows at 1. the pointindexviewport should be 1. and the pointindex shoyul
