3D Part Preview added to Parts Tracker

[Orion Pobursky]

Looks like BFC coloring is fooled by noclip statements. See:
https://www.ldraw.org/cgi-bin/ptdetail.c...231p01.dat
https://www.ldraw.org/cgi-bin/ptdetail.c...69bpz4.dat
https://www.ldraw.org/cgi-bin/ptdetail.c...086ps1.dat
These files show 3 different types of wrong rendering.

I already noticed this and PM'd Lasse

Also: I have had problems with zooming level (goes to extreme zoom in) when rapidly switching between rendering modes and rotate view. So far I've not been able to reproduce this reliably.

This is probably caused by 2 bits of code trying to run at the same time since part loading is asynchonous.