Description
Following up on #667, we should add an option in model's asset properties to select materials to use in place of the embedded materials whenever the model is added to a scene. The goal is to be able to change what materials are assigned by default on the CMaterialRenderer.
Bonus: when clicking on "Generate Materials" we could automatically (or ask the user with a confirmation popup) to add these generated material to the model's asset properties "remapped materials". This way the user could quickly "export" the materials, and modify them, and make sure that whenever the model is used in a scene, the generated materials will be used.

Description
Following up on #667, we should add an option in model's asset properties to select materials to use in place of the embedded materials whenever the model is added to a scene. The goal is to be able to change what materials are assigned by default on the
CMaterialRenderer.Bonus: when clicking on "Generate Materials" we could automatically (or ask the user with a confirmation popup) to add these generated material to the model's asset properties "remapped materials". This way the user could quickly "export" the materials, and modify them, and make sure that whenever the model is used in a scene, the generated materials will be used.