Improve changelog extraction

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Fix autosave not launched before preview and protect against potentia…

…l data loss on save

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Comment debugging code in MainFrame

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Update make-version-metadata.js comment

Fix formatting

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Fix deploy script for web-app

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Fix unaligned text for "Unknown behavior" (4ian#1382)

- Remove useless span
- Remove useless style related to span
- Use `Text` for Unknown behavior to ensure alignement and correct font.