cubicweb-jqplot #2522308 Don't hardcode "useSeriesColor" option [open]

JQPlotRsetView` sets ``useSeriesColor to True and there is no easy way to change this in subclasses other than redefining the whole onload string.

prioritynormal
typeenhancement
done in<not specified>
load0.100
load left0.100
closed by<not specified>