Updating the scene to Unity 2019.3.3f1.

Assets/Scenes/SimpleAR/SimpleAR.unity

   m_ReflectionIntensity: 1
   m_CustomReflection: {fileID: 0}
   m_Sun: {fileID: 0}
-  m_IndirectSpecularColor: {r: 0.44657898, g: 0.49641287, b: 0.5748173, a: 1}
+  m_IndirectSpecularColor: {r: 0.44657874, g: 0.49641275, b: 0.5748172, a: 1}
   m_UseRadianceAmbientProbe: 0
 --- !u!157 &3
 LightmapSettings:

Assets/Scenes/UX/SampleUXScene.unity

   m_Name: 
   m_EditorClassIdentifier: 
   m_CameraManager: {fileID: 282840816}
+  m_Arrow: {fileID: 0}
 --- !u!1 &1335839533
 GameObject:
   m_ObjectHideFlags: 0