improve material upgrade

com.unity.render-pipelines.high-definition/HDRP/Editor/Upgraders/HDRPVersion.cs

             // Compare project version with current version - Trigger an upgrade if user ask for it
             if (GetCurrentHDRPProjectVersion() < hdrpVersion)
             {
-                if (EditorUtility.DisplayDialog("A newer version of Unity has been detected",
-                                                "Do you want to upgrade your materials to newer version?\n You can also upgrade manually materials in Edit -> Render Pipeline submenu", "Yes", "No"))
+                if (EditorUtility.DisplayDialog("A newer version of HDRP has been detected",
+                                                "Do you want to upgrade your materials to newer version?\n You can also upgrade manually materials in 'Edit -> Render Pipeline' submenu", "Yes", "No"))
+        }
+    }
-            // Update current project version with HDRP version
-            WriteCurrentHDRPProjectVersion();
+    public class FileModificationWarning : UnityEditor.AssetModificationProcessor
+    {
+        static string[] OnWillSaveAssets(string[] paths)
+        {
+            foreach (string path in paths)
+            {
+                // Detect when we save project and write our HDRP version at this time.
+                if (path == "ProjectSettings/ProjectSettings.asset")
+                {
+                    // Update current project version with HDRP version
+                    HDRPVersion.WriteCurrentHDRPProjectVersion();
+                }
+            }
+            return paths;
         }
     }
 }

com.unity.render-pipelines.high-definition/HDRP/Editor/Upgraders/UpgradeMenuItem.cs

             }
         }
 
-        [MenuItem("Edit/Render Pipeline/Update all Materials to latest version", priority = CoreUtils.editMenuPriority3)]
+        [MenuItem("Edit/Render Pipeline/Single step upgrade script/Upgrade all Materials EmissionColor", priority = CoreUtils.editMenuPriority3)]
+        static public void UpdateMaterialToNewerVersionEmissiveColor()
+        {
+            UpdateMaterialToNewerVersion("(EmissiveColor)", UpdateMaterial_EmissiveColor, UpdateMaterialFile_EmissiveColor);
+        }
+
+        [MenuItem("Edit/Render Pipeline/Upgrade all Materials to latest version", priority = CoreUtils.editMenuPriority3)]
         static public void UpdateMaterialToNewerVersion()
         {
             // Add here all the material upgrade function supported in this version