Refactor settings types to use scripting API

Source/Engine/Content/JsonAsset.cpp

@@ -214,6 +214,7 @@ Asset::LoadResult JsonAsset::loadAsset()
             if (!instance)
                 return LoadResult::Failed;
             Instance = instance;
+            InstanceType = typeHandle;
             _dtor = type.Class.Dtor;
             type.Class.Ctor(instance);
 
@@ -238,6 +239,7 @@ void JsonAsset::unload(bool isReloading)
 
     if (Instance)
     {
+        InstanceType = ScriptingTypeHandle();
         _dtor(Instance);
         Allocator::Free(Instance);
         Instance = nullptr;

Source/Engine/Content/JsonAsset.h

@@ -74,7 +74,6 @@ protected:
 /// <summary>
 /// Generic type of Json-format asset. It provides the managed representation of this resource data so it can be accessed via C# API.
 /// </summary>
-/// <seealso cref="JsonAssetBase" />
 API_CLASS(NoSpawn) class JsonAsset : public JsonAssetBase
 {
 DECLARE_ASSET_HEADER(JsonAsset);
@@ -83,6 +82,11 @@ private:
 
 public:
 
+    /// <summary>
+    /// The scripting type of the deserialized unmanaged object instance (e.g. PhysicalMaterial).
+    /// </summary>
+    ScriptingTypeHandle InstanceType;
+
     /// <summary>
     /// The deserialized unmanaged object instance (e.g. PhysicalMaterial).
     /// </summary>