Add changes according to PR feedback

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Inspector/MasterPreviewView.cs

 
 namespace UnityEditor.ShaderGraph.Drawing.Inspector
 {
-    public class MasterNodeView : VisualElement
+    public class MasterPreviewView : VisualElement
     {
         AbstractMaterialGraph m_Graph;
 
 
         MasterNode m_MasterNode;
 
-        public MasterNodeView(string assetName, PreviewManager previewManager, AbstractMaterialGraph graph)
+        public MasterPreviewView(string assetName, PreviewManager previewManager, AbstractMaterialGraph graph)
         {
             m_Graph = graph;
 

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Views/GraphEditorView.cs

         MaterialGraphView m_GraphView;
         GraphInspectorView m_GraphInspectorView;
 
-        MasterNodeView m_MasterNodeView;
+        MasterPreviewView m_MasterNodeView;
 
         private EditorWindow m_EditorWindow;
 
 
                 m_GraphView.Add(m_GraphInspectorView);
 
-                m_MasterNodeView = new MasterNodeView(assetName, previewManager, graph) { name = "masterNodePreview" };
+                m_MasterNodeView = new MasterPreviewView(assetName, previewManager, graph) { name = "masterNodePreview" };
+                m_MasterNodeView.RegisterCallback<PostLayoutEvent>(UpdateSerializedWindowLayout);
+
-                m_FloatingWindowsLayoutKey = assetName + "_FloatingWindowsLayout";
+                m_FloatingWindowsLayoutKey = "FloatingWindowsLayout";
                 string serializedWindowLayout = EditorUserSettings.GetConfigValue(m_FloatingWindowsLayoutKey);
 
                 if (!String.IsNullOrEmpty(serializedWindowLayout))
             }
         }
 
+        void UpdateSerializedWindowLayout(PostLayoutEvent evt)
+        {
+            m_FLoatingWindowsLayout.inspectorLayout = m_GraphInspectorView.layout;
+            m_FLoatingWindowsLayout.previewLayout = m_MasterNodeView.layout;
+
+            string serializedWindowLayout = JsonUtility.ToJson(m_FLoatingWindowsLayout);
+            EditorUserSettings.SetConfigValue(m_FloatingWindowsLayoutKey, serializedWindowLayout);
+        }
+
         public void Dispose()
         {
             onUpdateAssetClick = null;
                 Object.DestroyImmediate(m_SearchWindowProvider);
                 m_SearchWindowProvider = null;
             }
-
-            m_FLoatingWindowsLayout.inspectorLayout = m_GraphInspectorView.layout;
-            m_FLoatingWindowsLayout.previewLayout = m_MasterNodeView.layout;
-
-            string serializedWindowLayout = JsonUtility.ToJson(m_FLoatingWindowsLayout);
-            EditorUserSettings.SetConfigValue(m_FloatingWindowsLayoutKey, serializedWindowLayout);
         }
     }
 }

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Resources/Styles/MaterialGraph.uss

     padding-bottom: 4;
 }
 
-MasterNodeView {
+MasterPreviewView {
     flex-direction: column;
     position-type: absolute;
     position-right: 0;
     min-height: 200;
 }
 
-MasterNodeView > #top {
+MasterPreviewView > #top {
-MasterNodeView > #top > #title {
+MasterPreviewView > #top > #title {
-MasterNodeView > #top {
+MasterPreviewView > #top {
     padding-top: 8;
     padding-bottom: 8;
     padding-left: 8;
-MasterNodeView > #middle {
+MasterPreviewView > #middle {
-MasterNodeView > #middle > #preview {
+MasterPreviewView > #middle > #preview {
-MasterNodeView > #bottom {
+MasterPreviewView > #bottom {
     background-color: rgb(79, 79, 79);
     position-type: absolute;
     position-bottom: 0;
     padding-bottom: 12;
 }
 
-MasterNodeView > #bottom > #picker > ObjectFieldDisplay > Label {
+MasterPreviewView > #bottom > #picker > ObjectFieldDisplay > Label {
     font-size: 11;
 }