Add missing empty HDAdditionalReflectionData in editor

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/HDReflectionProbeEditor.cs

 
             p.Apply();
 
-            HideAdditionalComponents(false);
+            //HideAdditionalComponents(false);
 
             HDReflectionProbeUI.DoShortcutKey(p, this);
         }

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/HDAdditionalReflectionDataEditor.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Experimental.Rendering.HDPipeline;
+
+namespace UnityEditor.Experimental.Rendering.HDPipeline
+{
+    [CustomEditor(typeof(HDAdditionalReflectionData))]
+    [CanEditMultipleObjects]
+    partial class HDAdditionalReflectionDataEditor : Editor
+    {
+        public override void OnInspectorGUI()
+        {
+        }
+    }
+}

com.unity.render-pipelines.high-definition/HDRP/Editor/Lighting/Reflection/HDAdditionalReflectionDataEditor.cs.meta

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+MonoImporter:
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+  icon: {instanceID: 0}
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