[FR] marker_z should enforce same length as number of markers

[BioTurboNick]

I missed a pretty bad mistake in my code for a while because marker_z is permissive for too-long input. It throws an error if the input is too short.

scatter([1, 2, 3], [4, 5, 6], marker_z = [1, 2, 3])
scatter([1, 2, 3], [4, 5, 6], marker_z = [1, 2, 3, 4]) # allowed
scatter([1, 2, 3], [4, 5, 6], marker_z = [1, 2]) # error

[BeastyBlacksmith]

I am mildly surprised that it doesn't cycle the short input

[BioTurboNick]

I'm going to generalize this issue. All data entries should be treated the same. x, y, z, marker_z, fill_z, line_z, etc. should all just be considered components of the data series and have the same behaviors.