fixed planar probe preview

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

             }
 
             m_UIState.DoShortcutKey(this);
-
-            //[TODO]check
-            //SceneViewOverlay_Window(_.GetContent("Planar Probe"), OnOverlayGUI, -100, target);
         }
 
 

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

             probe.influenceVolume.Init(probe);
         }
 
+        protected override void OnSceneGUI()
+        {
+            base.OnSceneGUI();
+
+            SceneViewOverlay_Window(_.GetContent("Planar Probe"), OnOverlayGUI, -100, target);
+        }
+
 
         const float k_PreviewHeight = 128;
         List<Texture> m_PreviewedTextures = new List<Texture>();