fix: UI elements not scrolling when editor DOM element is scrollable

[matthewlipski]

Summary

This PR fixes a bug where UI elements do not scroll with the editor, when the editor's DOM element is scrollable.

Rationale

This is a regression introduced in #2143.

Changes

• Added missing contextElement to virtual element in GenericPopover.
• Added scrollable editor example.

Impact

N/A

Testing

N/A

Screenshots/Video

N/A

Checklist

• Code follows the project's coding standards.
• Unit tests covering the new feature have been added.
• All existing tests pass.
• The documentation has been updated to reflect the new feature

Additional Notes

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Project	Deployment	Preview	Updated (UTC)
blocknote	Ready	Preview	Dec 5, 2025 0:04am
blocknote-website	Ready	Preview	Dec 5, 2025 0:04am

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commit: 622a21d

[YousefED]

docs: false

[YousefED]

run format document to prevent large diff