Plottable.Scales.Color - loop lightening should be toggleable

[teamdandelion]

If the user provides a hand-picked color range, I think the 'loop lightening' should be disableable and maybe disable by default - if you have a large number of charts that can be toggled on and off, with a relatively small color range, it pretty quickly saturates the color to almost pure white, which is undesirable.

[dev6james]

This has to be in. Can't believe it's not available.

[hellochar]

If disabled, what would the wanted behavior be for a color scale whose range is 3 colors but whose domain is 10? Recycling the colors? Always choosing white? Throw an error? None of those sound significantly more appealing

[teamdandelion]

Recycling the colors is significantly better than using all black or all white or throwing an error. Some information > no information.