Fixed some errors

Editor/MenuItems.cs

             Menu.SetChecked(kToggleGizmosMenu, s_ShowAllGizmos);
         }
 
-        [InitializeOnLoadMethod]
         [MenuItem(kToggleGizmosMenu, priority = 600, validate = true)]
         static bool CheckToggleGizmos()
         {

Editor/SceneViewPOV/SceneViewPOV.cs

             if (activePOV == null)
             {
                 activePOV = CreatePOVRootObject();
-                MarkDirtyPOVScene(POVRoot);
+                MarkDirtyPOVScene(activePOV);
             };
 
             POVRoot = activePOV;