User cannot undo the automatic changing of Mobility settings

When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by the user. The parent or child that automatically changed does not get reverted.

1. Open QAGame in editor.
2. Place an Empty Actor into the level.
3. Select the empty actor.
4. In the Details panel, add another scene component to the actor.
5. Select the child scene component.
6. In the Details for the component, change the Mobility to Static (this will force the DefaultSceneRoot to be static as well).
7. Undo.
8. Select the DefaultSceneRoot.

RESULT:

The child scene component reverts to Movable, but the parent is still Static.

EXPECTED:

For both parent and child to revert to Movable.