[Feature request] Cover image inline editing

[magnetar47]

We have multiple people who've worked on the cataloguing process, and sometimes, the cover image for manual additions doesn't come out well. I would appreciate the convenience of editing the cover image inline, or at least download the image, so that I can crop it properly, resize it, etc. and reupload it. Otherwise, I'll have to track down the book from the shelves just to take a picture of its cover.

[magnetar47]

Another benefit of downloading the cover image - we can reuse the image for manual additions of items having the exact same cover, instead of having to take a new picture with the phone, cropping it, etc.