* Rename SiteConfig
* More renaming
* Update spec
* Update mandatory settings mapping
* More renaming
* e2e test fixes
* You have a rename, and you have a rename
* Spec fix
* More changes
* Temporarily disable specs
* After-merge update
* Undo rename for migration
* undo rename of DUS
* Fix DUS
* Fix merge problem
* Remove redundant DUS
* Fix specs
* Remove unused code
* Change wrong class name
* More cleanup
* Re-add missing values to constant
* Fix constant
* Fix spec
* Remove obsolete fields
* Add accidentally removed field
* Update spec
* Move methods from Settings::General to ForemInstance
* Remove unneeded model
* Change mentions of 'site config'
* Use proper Mailchimp newsletter IDs respective to methods
* Add guard clauses when Mailchimp newsletter isn't enabled
* Rubocop correction
* Only unsub after destroy if Mailchimp newsletter is enabled
* Refactor a bit
* Fix typo
* Fix boolean logic for guard clauses
* Update tests to account for new SiteConfig logic
* Break guard clause into two clauses
