[UPD] 8.0 analysis without _auto=False

This analysis ignores models with  _auto=False. There is a puzzling false positive stating that fields from mail.thread moved to website_mail, but that is because mail.thread (an AbstractModel from the mail module) is accidentally overriden in website_mail as a regular Model). I dislike the fact that there is now no clear overview of the changes in abstract models such as mail.thread, but the changes are in every model that inherits from it so I guess that will have to do.