When loading VRML files exported by PCBnew with Inline nodes, submodels
were incorrectly scaled. The parent file correctly disabled unit
conversion after detecting a top-level scale transform, but inline
submodels were loaded as separate WRL2BASE instances that defaulted to
legacy unit conversion mode.
Propagate the parent's unit conversion setting to inline submodels so
they use the same scaling behavior as the main VRML file.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/19091
Seth Hillbrand
3b09eedb3e