various small fixes

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

-using UnityEditor.Experimental.Rendering.HDPipeline;
-using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 
 namespace UnityEditor.Experimental.Rendering.HDPipeline
         [DrawGizmo(GizmoType.Active)]
         static void RenderGizmo(ReflectionProbe reflectionProbe, GizmoType gizmoType)
         {
-            HDReflectionProbeEditor e = GetEditorFor(reflectionProbe);
+            var e = GetEditorFor(reflectionProbe);
             if (e == null || !e.sceneViewEditing)
                 return;
 

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

 using System.Collections.Generic;
-using UnityEditor.Experimental.Rendering.HDPipeline;
-using UnityEngine.Experimental.Rendering;
 using UnityEngine.Experimental.Rendering.HDPipeline;
 using UnityEngine.Rendering;
 

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

         {
             so.Update();
             addso.Update();
+            //InfluenceVolume does not have Update. Add it here if it have in the futur.
 
             // Set the legacy blend distance to 0 so the legacy culling system use the probe extent
             legacyBlendDistance.floatValue = 0;

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

                 {
                     if (m_Version < 3)
                     {
-                        MigrateToHDProbeChild();
+                        MigrateToUseInfluenceVolume();
                     }
                     m_Version = currentVersion;
                 }
             OnAfterDeserialize();   //continue migrating if needed
         }
 
-        void MigrateToUseInfluanceVolume()
+        void MigrateToUseInfluenceVolume()
         {
 #pragma warning disable CS0618 // Type or member is obsolete
             influenceVolume.shape = influenceShape;

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

     [ExecuteInEditMode]
     public class PlanarReflectionProbe : HDProbe, ISerializationCallbackReceiver
     {
-        [HideInInspector]
         const int currentVersion = 2;
 
         [SerializeField, FormerlySerializedAs("version")]