[Bug] Wrong label color for PlotScatter

[brenocq]

Bug description
The marker color is not being used when plotting legend items. It looks like the label color for PlotScatter items comes from LineColor instead of MarkerLineColor.

Bug video/screenshot

[olivier-gerard]

Hello, just adding a point to this issue, as I noted a related bug (I can open a new issue if you prefer):

Label color cannot be tuned for PlotDummy. (I was previously using SetNextLineStyle to do so)

[brenocq]

Thanks for pointing that out @olivier-gerard! I implemented the PlotDummy fix in 4ce67e3

[brenocq]

The wrong label color for PlotScatter was fixed in 1351ab2