Are here!
If you click an image in an entry it will now expand into its own window to fit the screen (up to either the size of the screen, or the size of the photo, whichever is smaller). Click the X in the top right corner, or press ESC on your keyboard to close the popup.
It should work with all existing images in entries without needing to revisit them and re-save them.
Let me know your thoughts 😀