Fix pointer hover on descendant controls when action manager is recursive

[carolhmj]

Related forum issue: https://forum.babylonjs.com/t/hovercursor-does-not-change-when-hovering-child-elements/31104
Playground: https://playground.babylonjs.com/#68S8IM

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[azure-pipelines]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[azure-pipelines]

Snapshot stored with reference name:
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