Rebase editor can be delayed on slow networks

[eamodio]

For some reason (probably avatars) the rebase editor seems like it can be affected by slow networks. We should resolve this and ensure that any network-based enrichment we do is async to the loading of the editor itself.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.