Diable UI camera HMD tracking

Author: lawwong

Assets/HTC.UnityPlugin/ViveInputUtility/Scripts/Misc/ExCamConfigInterface/ExCamConfigInterfacePanelController.cs

@@ -440,6 +440,11 @@ private void Awake()
                 EventSystem.current.gameObject.AddComponent<StandaloneInputModule>();
             }
 
+#if UNITY_5_4_OR_NEWER
+            // Disable the camera tracking to HMD
+            GetComponentInChildren<Camera>().stereoTargetEye = StereoTargetEyeMask.None;
+#endif
+
             transform.GetChild(0).gameObject.SetActive(true); // force update UI layout
 
             UpdateRecenterButtonVisible();