I would also like to ask about one small UI feature before submitting it as a PR.
Sigil-Enhanced has an image hover preview in the Book Browser. Hovering over an image shows a small preview together with its dimensions and file size.
I have adapted the current implementation against Sigil master here:
https://github.com/rinne1998/Sigil/c...hover-preview/
Would this be something you would be interested in having in Sigil itself?
