Fixed a few upgrading bugs

ScriptableRenderPipeline/LightweightPipeline/LWRP/Editor/LightweightMaterialUpgrader.cs

             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Bumped Specular", SupportedUpgradeParams.specularOpaque));
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Parallax Diffuse", SupportedUpgradeParams.diffuseOpaque));
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Parallax Specular", SupportedUpgradeParams.specularOpaque));
-            upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/VertexLit", SupportedUpgradeParams.diffuseOpaque));
-            upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Transparent/Cutout/VertexLit", SupportedUpgradeParams.diffuseAlphaCutout));
+            upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/VertexLit", SupportedUpgradeParams.specularOpaque));
+            upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Transparent/Cutout/VertexLit", SupportedUpgradeParams.specularAlphaCutout));
 
             // Reflective
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/Bumped Diffuse", SupportedUpgradeParams.diffuseCubemap));
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/Diffuse", SupportedUpgradeParams.diffuseCubemap));
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/Specular", SupportedUpgradeParams.specularCubemap));
-            upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/VertexLit", SupportedUpgradeParams.specularCubemap));
+            upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/VertexLit", SupportedUpgradeParams.diffuseCubemap));
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/Parallax Diffuse", SupportedUpgradeParams.diffuseCubemap));
             upgraders.Add(new StandardSimpleLightingUpgrader("Legacy Shaders/Reflective/Parallax Specular", SupportedUpgradeParams.specularCubemap));
 
             /////////////////////////////////////
             // Sprites Upgraders
             /////////////////////////////////////
-            upgraders.Add(new StandardSimpleLightingUpgrader("Sprites/Diffuse", SupportedUpgradeParams.diffuseOpaque));
+            upgraders.Add(new StandardSimpleLightingUpgrader("Sprites/Diffuse", SupportedUpgradeParams.diffuseAlpha));
 
             /////////////////////////////////////
             // UI Upgraders
 
             if (oldShaderName.Contains("Legacy Shaders/Self-Illumin"))
             {
-                RenameTexture("_MainTex", "_EmissionMap");
-                RemoveTexture("_MainTex");
+                RenameTexture("_Illum", "_EmissionMap");
+                RemoveTexture("_Illum");
                 SetColor("_EmissionColor", Color.white);
             }
         }