Tracer options

[icrls984]

I would like to make two suggestions about tracers. The first is a new property called showTracerBody or something on the lines of that. If false, The tracer body is not shown. The second property should be called matchingColor. If this is false when you change the tracer's color the part of the trail before the color switched should be it's original color, not the new color.
I know that there probably never be changes to Algodoo but I'm just putting this out there anyway.

[HenrikUp]

it can be useful