fix broken ON function for lights and snippets on the DMD

[JockeJarre]

Describe the bug
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To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

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Expected behavior
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Screenshots
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Log files
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Versions & Settings

• B2S Designer: [e.g. 2.0.0-0d4a30e]

Additional context
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