Merge pull request #1744 from Unity-Technologies/sg/fix-for-saving-dirty-shader-graph

Fix for saving dirty shader graph

com.unity.shadergraph/CHANGELOG.md

 - Texture 2D Array and Texture 3D nodes can no longer be used in the vertex shader.
 - Shader graphs using alpha clip now generate correct depth and shadow passes.
 - `Normal Create` node has been renamed to `Normal From Texture`.
+- When you close the Shader Graph after you have modified a file, the prompt about saving your changes now shows the file name as well.
 - `Blend` node now supports Overwrite mode.
 - `Simple Noise` node no longer has a loop.
 - The `Polygon` node now calculates radius based on apothem.

com.unity.shadergraph/Editor/Drawing/MaterialGraphEditWindow.cs

         {
             if (graphObject != null)
             {
-                if (graphObject.isDirty && EditorUtility.DisplayDialog("Shader Graph Has Been Modified", "Do you want to save the changes you made in the shader graph?\n\nYour changes will be lost if you don't save them.", "Save", "Don't Save"))
+                string nameOfFile = AssetDatabase.GUIDToAssetPath(selectedGuid);
+                if (graphObject.isDirty && EditorUtility.DisplayDialog("Shader Graph Has Been Modified", "Do you want to save the changes you made in the shader graph?\n" + nameOfFile + "\n\nYour changes will be lost if you don't save them.", "Save", "Don't Save"))
                     UpdateAsset();
                 Undo.ClearUndo(graphObject);
                 DestroyImmediate(graphObject);