When review UIs are rendered into the diff viewer, the fragment template

was including an "inline-actions-header" table row. In a case that in

practice would never be hit, this could theoretically contain "Review"

and "New Comment" buttons (like we have in the file attachment

thumbnail), but those buttons had no handlers. In the more common case

of a review UI that renders inline review content, the result was an

ugly table row that didn't have anything in it, but took up space.

Looked at the diff viewer with image review UIs rendered and saw that

there weren't any ugly gaps.