fix: Make OnDestroy and OnEnable both protected and virtual so they can properly be overidden in deriving classes.

Author: paulhazen

Assets/Plugins/Source/Editor/EditorWindows/EOSEditorWindow.cs

@@ -122,7 +122,7 @@ protected EOSEditorWindow(string windowTitle, float minimumHeight = 50f, float m
         /// </summary>
         public string WindowTitle { get; }
 
-        private void OnEnable()
+        protected virtual void OnEnable()
         {
             _initializeTask = Initialize();
             EditorApplication.update += CheckForInitialized;
@@ -288,7 +288,7 @@ public void OnGUI()
             }
         }
 
-        public void OnDestroy()
+        protected virtual void OnDestroy()
         {
             Teardown();
         }