"ShaderGraphImporterEditor.OnInspectorGUI" exception is thrown on deleting PBR-Graph/Unlit-Graph/Sub-Graph

Steps to repro:
1. Create a new project.
2. Windows > Package Manager > Shader Graph.
3. Select 5.3.1 package version > Install.
4. Project Window > Create > Shader >PBR-Graph/Unlit-Graph/Sub-Graph
5. Delete newly created Shader Graph from Project Window

Actual Result:
"ShaderGraphImporterEditor.OnInspectorGUI must call ApplyRevertGUI to avoid unexpected behaviour." exception is thrown in the console.

Expected Result:
No exception is thrown in the console.

Reproducible on:
2019.2.0a6

Works fine on:
2019.2.0a5, 2019.1.0b4

Package Version: 5.3.1, 5.1.0.

Environment:
Windows and MacOS

Stack Trace:
ShaderGraphImporterEditor.OnInspectorGUI must call ApplyRevertGUI to avoid unexpected behaviour.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)