Merge branch 'HDRP/staging' of https://github.com/Unity-Technologies/ScriptableRenderPipeline into Branch_FixPPCopy

# Conflicts:
#	com.unity.render-pipelines.high-definition/CHANGELOG.md

com.unity.render-pipelines.high-definition/CHANGELOG.md

 ### Fixed
 - Fixed an issue with distortion that was using previous frame instead of current frame
 - Fixed an issue where disabled light where not upgrade correctly to the new physical light unit system introduce in 2.0.5-preview
+- Fixed an issue with PreIntegratedFGD texture being sometimes destroyed and not regenerated causing rendering to break
 - PostProcess input buffers are not copied anymore on PC if the viewport size matches the final render target size
 
 ## [2.0.5-preview]

com.unity.render-pipelines.high-definition/HDRP/Debug/DebugDisplay.cs

         {
             m_DebugDisplayStatsItems = new DebugUI.Widget[]
             {
-                new DebugUI.Value { displayName = "Frame Rate", getter = () => 1f / Time.smoothDeltaTime, refreshRate = 1f / 30f },
-                new DebugUI.Value { displayName = "Frame Rate (ms)", getter = () => Time.smoothDeltaTime * 1000f, refreshRate = 1f / 30f }
+                new DebugUI.Value { displayName = "Frame Rate (fps)", getter = () => 1f / Time.smoothDeltaTime, refreshRate = 1f / 30f },
+                new DebugUI.Value { displayName = "Frame Time (ms)", getter = () => Time.smoothDeltaTime * 1000f, refreshRate = 1f / 30f }
             };
 
             var panel = DebugManager.instance.GetPanel(k_PanelDisplayStats, true);

com.unity.render-pipelines.high-definition/HDRP/Lighting/LightLoop/LightLoopSettings.cs

         {
             widgets.AddRange(new[]
             {
-                new DebugUI.Container
+                new DebugUI.Foldout
-                    displayName = "Lighting Settings",
+                    displayName = "Light Loop Settings",
                     children =
                     {
                         // Uncomment if you re-enable LIGHTLOOP_SINGLE_PASS multi_compile in lit*.shader

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/Lit.cs

         // Init precomputed texture
         //-----------------------------------------------------------------------------
 
-        bool m_isInit;
-
         public Lit() {}
 
         public override void Build(HDRenderPipelineAsset hdAsset)
-
-            m_isInit = false;
         }
 
         public override void Cleanup()
-
-            m_isInit = false;
-            if (m_isInit)
-                return;
-
-
-            m_isInit = true;
         }
 
         public override void Bind()

com.unity.render-pipelines.high-definition/HDRP/Material/PreIntegratedFGD/PreIntegratedFGD.cs

 
         public void RenderInit(FGDIndex index, CommandBuffer cmd)
         {
-            if (m_isInit[(int)index])
+            // Here we have to test IsCreated because in some circumstances (like loading RenderDoc), the texture is internally destroyed but we don't know from C# side.
+            // In this case IsCreated will return false, allowing us to re-render the texture (setting the texture as current RT during DrawFullScreen will automatically re-create it internally)
+            if (m_isInit[(int)index] && m_PreIntegratedFGD[(int)index].IsCreated())
                 return;
 
             using (new ProfilingSample(cmd, "PreIntegratedFGD Material Generation"))

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLit.cs

         // Init precomputed textures
         //-----------------------------------------------------------------------------
 
-        bool m_isInit;
-
         public StackLit() {}
 
         public override void Build(HDRenderPipelineAsset hdAsset)
-
-            m_isInit = false;
         }
 
         public override void Cleanup()
-
-            m_isInit = false;
-            if (m_isInit)
-                return;
-
-
-            m_isInit = true;
         }
 
         public override void Bind()

com.unity.render-pipelines.high-definition/HDRP/RenderPipeline/Settings/FrameSettings.cs

         {
             List<DebugUI.Widget> widgets = new List<DebugUI.Widget>();
             widgets.AddRange(
-                new DebugUI.Widget[]
+            new DebugUI.Widget[]
-                new DebugUI.Container
+                new DebugUI.Foldout
                 {
                     displayName = "Rendering Passes",
                     children =
                         new DebugUI.BoolField { displayName = "Enable Postprocess", getter = () => frameSettings.enablePostprocess, setter = value => frameSettings.enablePostprocess = value },
                     }
                 },
-                new DebugUI.Container
+                new DebugUI.Foldout
                 {
                     displayName = "Rendering Settings",
                     children =
                         new DebugUI.BoolField { displayName = "Enable MSAA", getter = () => frameSettings.enableMSAA, setter = value => frameSettings.enableMSAA = value },
                     }
                 },
-                new DebugUI.Container
+                new DebugUI.Foldout
                 {
                     displayName = "XR Settings",
                     children =
                 },
-                new DebugUI.Container
+                new DebugUI.Foldout
                 {
                     displayName = "Lighting Settings",
                     children =