Add more genre colours/easily change the current definitions

[superluig164]

Is your feature request related to a problem? Please describe.

It would be pretty nice to be able add new genre definitions and colours to the list, to fill it out with more colours since Monstercat is no longer adding colours, seeing that they've deprecated the colourful visualizer.

Describe the solution you'd like

I can imagine a skin like the settings skin to add/remove definitions and change the colour (perhaps with a colour picker.) However, a way to do it just by editing ini files would be fine with me as well.

Describe alternatives you've considered

I tried to find out where the code is to do this in the skin, but I can't find it. If anyone could tip me off as to where all this stuff is defined and where I can add more genre definitions, please let me know.