* Change public accounts pages to mount the web UI
* Fix handling of remote usernames in routes
- When logged in, serve web app
- When logged out, redirect to permalink
- Fix `app-body` class not being set sometimes due to name conflict
* Fix missing `multiColumn` prop
* Fix failing test
* Use `discoverable` attribute to control indexing directives
* Fix `<ColumnLoading />` not using `multiColumn`
* Add `noindex` to accounts in REST API
* Change noindex directive to not be rendered by default before a route is mounted
* Add loading indicator for detailed status in web UI
* Fix missing indicator appearing while account is loading in web UI
* fix(column_header): Invalid ARIA role
* fix(column): Remove hidden nodes from the DOM
* refactor(column_link): Remove unused property hideOnMobile
* fix(column_header): Use aria-pressed
* fix(column_header): Make collapsed content not focusable, add focusable property
* fix(column_loading): Make header non-focusable
* fix(column_settings): Use role to group the toggles