Comment 15 for bug 100620

I changed the set category to layout, this now appears in the settings tab of images, files, and containers.

It occurs to me that:
1) we do want caching for files and images if the user is authenticated and (publically) viewing the site
BUT
2) we don't want caching for images (in particular) if you're in the SMI. E.G. if you are editing a Silva Document and have the web format of an image in the document...the web format will be cached in the browser by the cache manager settings.

This case may need to be resolved prior to the merge into trunk.