While reviewing this PR, I noticed something that's been bugging me about the image block in general – the icon that sits over the background during upload progress is way too large and the wrong color. It looks like this:

It looks like the Video block has the "proper" styling, which IIRC is:

• Background: good as-is (same as global placeholder background, which IIRC is gray-light from Colors Archive in light mode and gray 90 from Color Studio in dark mode)
• Icon size: 32x32
• Icon color (light mode): gray-lighten-20 from Colors Archive
• Icon color (dark mode): gray-70 from Color Studio

Which looks like this:

Tasks

• Apply above styling to image block upload state placeholder
• Cross-reference other blocks that have this sort of "in between" state/background, to ensure we are matching the above styling?