fix: Fixed exception in Reference property drawer

Author: SolidAlloy

.GenericUnityInternals/GenericUnityEditorInternals/GenericTypeHelper.cs

@@ -29,14 +29,14 @@ public static Type GetConcreteType(Type genericType)
         {
             if (typeof(MonoBehaviour).IsAssignableFrom(genericType))
             {
-                return BehavioursDatabase.TryGetConcreteType(genericType, out Type concreteType)
+                return GenericTypesDatabase<MonoBehaviour>.TryGetConcreteType(genericType, out Type concreteType)
                     ? concreteType
                     : genericType;
             }
 
             if (typeof(ScriptableObject).IsAssignableFrom(genericType))
             {
-                return ScriptableObjectsDatabase.TryGetConcreteType(genericType, out Type concreteType)
+                return GenericTypesDatabase<ScriptableObject>.TryGetConcreteType(genericType, out Type concreteType)
                     ? concreteType
                     : genericType;
             }

.GenericUnityInternals/GenericUnityEditorInternals/GenericUnityEventDrawer.cs

@@ -322,7 +322,7 @@ private static string GetBehaviourShortName(Type unityObjectType)
 
             private static string GetScriptableObjectShortName(Type unityObjectType)
             {
-                return ((unityObjectType is GenericScriptableObject) || unityObjectType.BaseType.IsGenericType) ? TypeUtility.GetNiceNameOfGenericType(unityObjectType.BaseType) : unityObjectType.Name;
+                return unityObjectType.BaseType.IsGenericType ? TypeUtility.GetNiceNameOfGenericType(unityObjectType.BaseType) : unityObjectType.Name;
             }
         }
     }