Use custom color function to color each square of the position probe independently

[GiuntaJ]

Hi,

Since each position probe is rendered with the renderControlSquare, it is not possible to use a custom color function to color each square with a different color because they will all use the color of the parent square.

For now, I overwrote renderControlSquare in my custom shape function to produce the result I wanted but I was wondering if it was possible in a next version to only use a custom color function to do this (for example, by using renderSquare for all the squares)?

Thank you in advance for your answer and thanks for all the work you did so far on the library.