Merge branch 'master' into patch-3

.../javascripts/components/components/column_collapsable.jsx

...s/javascripts/components/components/loading_indicator.jsx

...ssets/javascripts/components/components/media_gallery.jsx

...assets/javascripts/components/components/video_player.jsx

...scripts/components/features/account/components/header.jsx

...features/follow_requests/components/account_authorize.jsx

...nts/features/home_timeline/components/column_settings.jsx

...features/notifications/components/clear_column_button.jsx

...nts/features/notifications/components/column_settings.jsx

...ents/features/notifications/components/setting_toggle.jsx

...components/features/status/components/detailed_status.jsx

...scripts/components/features/ui/components/column_link.jsx

...pts/components/features/ui/containers/modal_container.jsx

app/assets/stylesheets/components.scss

docs/Using-Mastodon/List-of-Mastodon-instances.md