Added move up/down actions for volume components

ScriptableRenderPipeline/Core/Volume/Editor/VolumeEditor.cs

             Undo.DestroyObjectImmediate(prevSettings);
         }
 
+        void MoveComponent(int id, int offset)
+        {
+            // Move components
+            serializedObject.Update();
+            m_Components.MoveArrayElement(id, id + offset);
+            serializedObject.ApplyModifiedProperties();
+
+            // Move editors
+            var prev = m_Editors[id + offset];
+            m_Editors[id + offset] = m_Editors[id];
+            m_Editors[id] = prev;
+        }
+
+
+            if (id == 0)
+                menu.AddDisabledItem(CoreEditorUtils.GetContent("Move Up"));
+            else
+                menu.AddItem(CoreEditorUtils.GetContent("Move Up"), false, () => MoveComponent(id, -1));
+
+            if (id == m_Editors.Count - 1)
+                menu.AddDisabledItem(CoreEditorUtils.GetContent("Move Down"));
+            else
+                menu.AddItem(CoreEditorUtils.GetContent("Move Down"), false, () => MoveComponent(id, 1));
+
+            menu.AddSeparator(string.Empty);
             menu.AddItem(CoreEditorUtils.GetContent("Reset"), false, () => ResetComponent(targetComponent.GetType(), id));
             menu.AddItem(CoreEditorUtils.GetContent("Remove"), false, () => RemoveComponent(id));
             menu.AddSeparator(string.Empty);

ScriptableRenderPipeline/Core/Volume/VolumeManager.cs

                 float blendDistSqr = volume.blendDistance * volume.blendDistance;
 
                 // Volume has no influence, ignore it
-                // Note: Volume doesn't do anything when `closestDistanceSqr = blendDistSqr` but
-                //       we can't use a >= comparison as blendDistSqr could be set to 0 in which
-                //       case volume would have total influence
+                // Note: Volume doesn't do anything when `closestDistanceSqr = blendDistSqr` but we
+                //       can't use a >= comparison as blendDistSqr could be set to 0 in which case
+                //       volume would have total influence
                 if (closestDistanceSqr > blendDistSqr)
                     continue;