UVMap for ribbon style

[BradyAJohnston]

The ribbon cylinders (and potentially cartoon, but initially just ribbon) should be able to hold a UVMap for use with materials.

This was previously available internally but not properly exposed to the user, but some people still found it and were using it.

The same approach can be used for exposing them again, but this time actually storing and creating the UVMap so it should 'just work' with the materials