refactor: remove unneeded childrenUpdated slot listener in preset

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[Saul-Mirone]

• #7500
• #7498
• #7495
• #7494 👈
• #7493
• master

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Merge activity

• Jul 8, 7:01 AM EDT: Saul-Mirone added this pull request to the Graphite merge queue.
• Jul 8, 7:19 AM EDT: The Graphite merge queue couldn't merge this PR because it was not satisfying all requirements (Failed CI: 'Playground E2E test (1)').
• Jul 8, 10:03 AM EDT: Saul-Mirone added this pull request to the Graphite merge queue.
• Jul 8, 10:05 AM EDT: Saul-Mirone merged this pull request with the Graphite merge queue.