Since "Brevity is the soul of wit", and some people have thousands of images in their folders, people have requested the ability for the new image manager popup to have an option to the "summary list" mode of the old image manager. We've obliged, select View as summary
in the dropdown at the top of the image selector popup. This mode shows your images as (tiny) thumbnails, but manages to fit a lot more on the screen before you have to resize the window (50 per page, rather than 20 using the default thumbnails list).
We're doing this in preparation to remove the old image manager entirely, forcing all those still hanging onto the old one to upgrade - so if you've got any other issues holding you back from using the new one, now's a good time to let us know.