Essentially, the issue is that the Adjust Last Operation popup is
created in the new image editor window, before region polling was
executed for the new window. This region polling must be done first
because it can affect which regions are visible, and the
`ARegionType.on_poll_success()` callback may do additional set up.
Now make sure that region polling is always executed when a screen is
prepared for display, as part of the screen "refresh" code.
Note that the region polling is used for the asset shelf regions, which
are supported in the image editor since c60a1006e5.
Pull Request: https://projects.blender.org/blender/blender/pulls/123385
7fcd4e2429