autohide cursor

Assets/Prefabs/Menu.prefab

@@ -1754,7 +1754,7 @@ Canvas:
   m_GameObject: {fileID: 5305278010342315831}
   m_Enabled: 1
   serializedVersion: 3
-  m_RenderMode: 1
+  m_RenderMode: 0
   m_Camera: {fileID: 0}
   m_PlaneDistance: 100
   m_PixelPerfect: 0
@@ -1820,6 +1820,8 @@ MonoBehaviour:
   m_EditorClassIdentifier: 
   currentVis: {fileID: 5305278009821670017}
   vfxMenu: {fileID: 0}
+  mouseHideTimeSeconds: 3
+  mouseHideThreshold: 3
 --- !u!1 &6466943970290633308
 GameObject:
   m_ObjectHideFlags: 0