Merge branch '1.5-preview' into lwrp-support-2018.3-with-1.5

ProjectSettings/EditorBuildSettings.asset

   - enabled: 0
     path: Assets/Scenes/Scale.unity
     guid: 13ac91f677dc22f4ca320ef8ae727b68
-  - enabled: 1
+  - enabled: 0
     path: Assets/Scenes/SimpleAR.unity
     guid: 99c9720ab356a0642a771bea13969a05
   - enabled: 0