User upgrade conversation v1.7 changes: Now supports up to 8 user upgrades with individual phrases.
User upgrade conversation v1.6 changes: Now creates conversation immediately after upgrading account.
User upgrade conversation v1.5 changes: Added 'Approval queue update' to options page.
User upgrade conversation v1.4 changes: Added Single phrase to options page.
User upgrade conversation v1.2 changes: Fixed typo in phrase.
User upgrade conversation v1.1 changes: Added {username} variable to phrase.
