Unfortunately, the Class.equals() seems to compare something that
differs between our stored LED Spheres and the Clicked Primitive… Need
to find another way to compare…

All the code that we need to select a LED with the mouse is there…
Unfortunately, we have a "CapabilityNotSetException" and i don't know
where to set that capability… See Led3D.java Line 198!

Now always loads background for canvas 3D size.

… almost...