HDRenderPipeline: Update UI and fog test scene

SampleScenes/HDTest/SkyFogTest.unity

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SampleScenes/HDTest/SkyFogTest/Lit_Transparent_Add.mat

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SampleScenes/HDTest/SkyFogTest/Lit_Transparent_Add_NoFog.mat

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SampleScenes/HDTest/SkyFogTest/Lit_Transparent_Alpha.mat

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SampleScenes/HDTest/SkyFogTest/Lit_Transparent_Multiply.mat

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SampleScenes/HDTest/SkyFogTest/Lit_Transparent_PreMultipliedAlpha.mat

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-    _ENABLEVERTEXDISPLACEMENT_OFF _ENABLEWIND_OFF _ENABLE_FOG _NORMALMAP_TANGENT_SPACE
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SampleScenes/HDTest/SkyFogTest/Unlit_Transparent_Add.mat

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SampleScenes/HDTest/SkyFogTest/Unlit_Transparent_Add_NoFog.mat

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SampleScenes/HDTest/SkyFogTest/Unlit_Transparent_Alpha.mat

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SampleScenes/HDTest/SkyFogTest/Unlit_Transparent_Multiply.mat

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SampleScenes/HDTest/SkyFogTest/Unlit_Transparent_PreMultipliedAlpha.mat

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ScriptableRenderPipeline/HDRenderPipeline/Material/Unlit/Editor/BaseUnlitUI.cs

                 if (showBlendModePopup)
                     BlendModePopup();
 
+                EditorGUI.indentLevel++;
-
+                EditorGUI.indentLevel--;
             }
             m_MaterialEditor.ShaderProperty(alphaCutoffEnable, StylesBaseUnlit.alphaCutoffEnableText);
             if (alphaCutoffEnable.floatValue == 1.0f)

SampleScenes/HDTest/SkyFogTest/Rough_Refraction_Transparent.mat

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SampleScenes/HDTest/SkyFogTest/Rough_Refraction_Transparent.mat.meta

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