ADT clone method needs special version

[PatrickRyanMS]

Currently AdvacedDynamicTexure inherits clone from DynamicTexture so any ADT that is cloned becomes a Dynamic Texture. Expanding GUI with the editor means there is a user flow that loads a GUI template from a snippet and wants to project that template across several meshes that become individual GUI assets.

If we can build a special case for cloning ADTs, we can use clone. Right now the only way to create multiple ADTs is to parse the snippet/json several times.