piano roll and midi colors

[RustoMCSpit]

Enhancement Summary

is it possible to change different pitch values in the piano roll to be different colors (and have that vary when the piano roll is showing the chromatic scale vs when the user selects a scale to show the colors based off of solfege (assuming you can select scales in LMMS))

#7306

Implementation Details / Mockup

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[RustoMCSpit]

this is related #7611

do re mi etc. should be able to have different colors.