UX Workflow improvements for Physics Materials (#1237)

- Added button to PhysX Collider Component in PhysX Mesh's field to open FBX Settings.
- Added button Material Selection to open the physics material library in Asset Editor.
- Default Material in PhysX configuration is read only and consistent with the text in combo boxes.
- Material configuration field "Surface Type" renamed to "Name"
- Fixed bug in EditorColliderComponent where the material selection was not updated when changing the library.
- Fixed bug where the materials selection was not set to default when a physics material from the asset was not found in the library.
- Added attributes 'BrowseButtonEnabled' and 'BrowseButtonVisible' to PropertyAssetCtrl.
- Updated physx configuration setreg files of AutomatedTesting project.

Gems/PhysX/Code/Include/PhysX/MeshAsset.h

@@ -75,6 +75,8 @@ namespace PhysX
             AZ_CLASS_ALLOCATOR(MeshAsset, AZ::SystemAllocator, 0);
             AZ_RTTI(MeshAsset, "{7A2871B9-5EAB-4DE0-A901-B0D2C6920DDB}", AZ::Data::AssetData);
 
+            static void Reflect(AZ::ReflectContext* context);
+
             MeshAssetData m_assetData;
         };
     } // namespace Pipeline