delete trailing whitespace
add a few dummy mouse and plot prims

so models that make incidental use of them can be used
in the docking tests
add patchesWithLabels support

this is needed for Traffic Grid to pass the docking tests
more prims: exp, variance, base-colors
more models work now!

Traffic Grid, Peppered Moths, Fur, Ising, GenDrift P global, GenDrift
P local, GenDrift T reproduce