* Remove allowed_languages and add filtered_languages

* Use filtered_languages instead of allowed_languages

* Dont allow empty value in user allowed languages

* Sanitize language input to reject blank values in array

* Naive approached to timeline filtering

* Convert allowed_languages into a db column

* Allow users to choose languages to see statuses in

* Style list items as two columns

* Add a hint to explain language filtering preference

* Add render_views in more places

* Delegate methods from account to user with allow nil true, so that admin accounts show view renders when missing a user

* Use actual account instances in authorize follow controller spec

* Make private toots get PuSHed to subscription URLs that belong to domains where you have approved followers

* Authorized followers controller, stub for bulk action

* Soft block in the background

* Add simple test for new controller

* Rename Settings::FollowersController to Settings::FollowerDomainsController, paginate results,
rename "private" post setting to "followers-only", fix pagination style, improve post privacy
preferences style, improve warning style

* Extract compose form warnings into own container, show warning when posting to followers-only with unlocked account

* Add user spec for settings, highlight global default mutation issue

* Fix mutation issue caused by settings/preferences spec

* Add missing fields group on preferences page

* Clean up settings/preferences controller

* Extract a UserSettingsDecorator