DESCRIPTION

Errors and warnings spewed when using the light weight render pipeline, and shadergraph. The shader graph window is incorrectly rendered.

Steps to Reproduce
- Create a new project with the light weight RP template.
- Add Shadergraph from package manager (Version 0.1.17)
NOTICE ISSUE >> Errors and warnings appear in log.
- Project window > right click > create > shader > PBR Graph.
- Open the created shader.
NOTICE ISSUE >> Menu is incorrect.

Image ShaderGraphIssue.png attached.

Warnings.
GUID [ca91dbeb78daa054c9bbe15fef76361c] for asset 'Packages/com.unity.shadergraph/Editor/Data/LightweightPipeline/LightWeightPBRSubShader.cs' conflicts with:
'Packages/com.unity.render-pipelines.lightweight/LWRP/Editor/ShaderGraph/LightWeightPBRSubShader.cs' (current owner)
We can't assign a new GUID because the asset is in an immutable folder. The asset will be ignored.

Errors
Assembly has reference to non-existent assembly 'Unity.ShaderGraph.Editor' (Packages/com.unity.render-pipelines.lightweight/LWRP/Editor/com.unity.render-pipelines.lightweight.Editor.asmdef)