Merge branch 'master' of https://github.com/Unity-Technologies/ScriptableRenderPipeline

ScriptableRenderPipeline/Core/CoreRP/Editor/MaterialUpgrader.cs

         public static void UpgradeSelection(List<MaterialUpgrader> upgraders, string progressBarName, UpgradeFlags flags = UpgradeFlags.None)
         {
             var selection = Selection.objects;
+
+            if (selection == null || selection.Length == 0)
+                if (EditorUtility.DisplayDialog("Material Upgrader", "You must select at least one material.", "Ok"))
+                    return;
+
+            Debug.Log(selection.Length);
             for (int i = 0; i < selection.Length; i++)
             {
                 if (UnityEditor.EditorUtility.DisplayCancelableProgressBar(progressBarName, string.Format("({0} of {1}) {2}", i, selection.Length, lastMaterialName), (float)i / (float)selection.Length))

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Editor/Camera/HDCameraEditor.Handlers.cs

             m_PreviewCamera.CopyFrom(c);
             EditorUtility.CopySerialized(c, m_PreviewCamera);
             EditorUtility.CopySerialized(c.GetComponent<HDAdditionalCameraData>(), m_PreviewAdditionalCameraData);
-            var layer = c.GetComponent<PostProcessLayer>() ?? Assets.ScriptableRenderLoop.PostProcessing.PostProcessing.Runtime.Utils.ComponentSingleton<PostProcessLayer>.instance;
+            var layer = c.GetComponent<PostProcessLayer>() ?? ComponentSingleton<PostProcessLayer>.instance;
             EditorUtility.CopySerialized(layer, m_PreviewPostProcessLayer);
             m_PreviewCamera.cameraType = CameraType.SceneView;
             m_PreviewHDCamera.Update(m_PreviewPostProcessLayer, m_PreviewAdditionalCameraData.GetFrameSettings());

ScriptableRenderPipeline/LightweightPipeline/LWRP/Shaders/LightweightStandard.shader

         _SpecColor("Specular", Color) = (0.2, 0.2, 0.2)
         _SpecGlossMap("Specular", 2D) = "white" {}
 
-        [Toggle] _SpecularHighlights("Specular Highlights", Float) = 1.0
-        [Toggle] _GlossyReflections("Glossy Reflections", Float) = 1.0
+        [ToggleOff] _SpecularHighlights("Specular Highlights", Float) = 1.0
+        [ToggleOff] _GlossyReflections("Glossy Reflections", Float) = 1.0
 
         _BumpScale("Scale", Float) = 1.0
         _BumpMap("Normal Map", 2D) = "bump" {}