Fix spelling of "Schrodinger" in prop_weighted_cube

[Bluebotlabz]

Now uses Schrodinger as that is more consistent with the rest of the codebase

Would change it to Schrodinger but the code which handles model selection uses Schroedinger which is an accepted spelling, so I've changed all instances of it to say Schroedinger.

[AWildErin]

Model path and a vscript func (in fact pretty much all the code internally) refer to it as Schrodinger, so that might just be better for consistency's sake. Not that it really matters

[Bluebotlabz]

I just realised I misunderstood how the model dropdown worked and will now change it all to Schrodinger

[Bluebotlabz]

It is fixed now