A new plugin  to manage attachment and media files called xili-re-un-attach-media which adds the actions Unattach and Reattach at the Media Library Table list to manage attachments in the File column just after View action.
This plugin is only active in admin (dashboard) side.

Link to [Github by dev.xiligroup].

Here is a zip xili-re-un-attach-media containing the plugin for testing. Please read carefully the readme.txt …

xili-re-un-attach-media is now in WP plugin repository.