Reactive color for box plot

[carrascomj]

The color of box plots is not reactive (once spawned, they will forever have that color).

This is a problem since it is against the expectation of the user: the rest of the components are completely reactive.

This is a challenge since the color interpolation depends on knowing the data and the HistTag | Path entity is not aware of it's own values once spawned (unlike the ArrowTag or the CircleTag entities). It may require adding some extra Component to the boxpoints.