Fix/LocationSO not serialized properly (#258)

* Fix GameSceneSO not serialized properly.

* Add a reference to the script as a ObjectField in the GameSceneSO

To edit the code faster

* Fix typo

UOP1_Project/Assets/Scripts/Editor/GameSceneSOEditor.cs

 {
 	private const string NO_SCENES_WARNING = "There is no Scene associated to this location yet. Add a new scene with the dropdown below";
 	private GUIStyle _headerLabelStyle;
-	private static readonly string[] _excludedProperties = { "m_Script", "sceneName" };
+	private static readonly string[] _excludedProperties = { "m_Script", "sceneName" };  //m_script is a reference to the script being edited but it'll result an editable object field.
 
 	private string[] _sceneList;
 	private GameSceneSO _gameSceneInspected;
 
 	public override void OnInspectorGUI()
 	{
+		//Make GUI not editable.
+		GUI.enabled = false;
+		//Draw reference information about script being edited.
+		EditorGUILayout.ObjectField("Script", MonoScript.FromScriptableObject((GameSceneSO)target), typeof(GameSceneSO), false);
+		//Make GUI editable.
+		GUI.enabled = true;
+
+		serializedObject.Update();
+		serializedObject.ApplyModifiedProperties();
 	}
 
 	private void DrawScenePicker()