Show the image URL as the thumbnail's tooltip.
'Setters' need to be able to update infoPage.
Add a button to thumbnails while downloading to allow cancellation. Don't show network error message if the user cancelled it.
Cancel download if blacklisting mid-download.
You can't just delete yourself anymore!
Unused event variable.
Make progress bars vertical because we know exactly how much vertical space we have.
Hack to allow thumbnail view to have fixed size just big enough to accomodate scrollbar as well as content.
Use "dialog-cancel" instead of "edit-delete" for cancel button.