Editing citations data in Chrome extension

[Kerim]

Somewhat related to this request:

Show cover page when manually editing data (if there is a PDF)

When editing incomplete data one currently has to first open the PDF in a new window then go back and copy the data between two windows. It would be nicer if the edit window would notice when there is a PDF attached and show you the first page of the PDF (either the actual file so you can copy and paste, or just an image preview so you can at least look up the author, title, date, etc.). This would be really helpful for when data is incomplete or incorrect.