Hello Charlie, this is a concern that has been expressed along the thread for this issue report, found here. Some news about the subject is that latest versions of Confluence port a different view file engine that render attachments within the application nicely - now, in case you are looking for the editing part of the feature, you may like to add you concerns directly to the bug ticket in order to further increase its relevancy.
Hope this can lead you to the right path.
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