[Request] Add ability for material asset pickers to filter based on valid domain

Materials have a wide range of domains, this means that they will only be valid in specific circumstances.
Some examples:
Particle sprite materials need to have the `Particles` domain
Terrain materials need the `Terrain` domain
PostFx materials assigned to a PostFxVolume need the `Post Process` domain

I think that it would make a lot of sense for material asset pickers to only show materials that have a valid domain. Otherwise the list is polluted by non-applicable materials.

I also think that with this capability implemented, it would look better to change how the type is displayed beside the picker.
Instead of `MaterialBase`, it could instead display the domain e.g. `Terrain Material`, `Particle Material`, `GUI Material` etc.
Though, my only concern with this would be the potential of confusing users into believing that these are actually different types.