More/Improved Make Traces Different

A lot of color options within Make Traces Different have white in then. Graphs with black backgrounds are pretty unconventional, so this renders a lot of color sets unusable. Also, among the non-rainbow color sets I use, Spectrum and Cold Warm are the two most common. But these each have duplicate color confusion: the ends of spectrum are difficult to distinguish and there's a dark patch in cold warm that looks like the beginning.