When migrating content from hippogallery:exampleImageSet to hippogallery:imageset, also the hippostd:content needs to be checked and updated if needed

for example hippostd:content nodes contain something like

src="screenshot_cms_small.jpg/screenshot_cms_small.jpg/hippogallery:picture"

This is an inline image. Now, after upgrading to the new hippogallery:imageset, the /hippogallery:picture" should be replaced by /hippogallery:original"