onboard segmentation fault on python3.12

Bug Report Template

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1. Affected Package revision / version

onboard - 1.4.1-5ubuntu6

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2. Steps to Reproduce

1. launch onboard
2. move mouse over onboard
3. onboard crash / Segmentation fault

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3. Current Behavior

onboard is not working properly

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4. Expected Behavior (optional)

being able to use onboard without issues

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5. Workaround (optional)

run onboard-settings in a terminal and select GTK instead of Xinput

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6. Suggestions, Investigation and Possible Causes (optional)

Mentioned at: https://trisquel.info/es/forum/onboard-bug-or-just-me

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