Conflicts:
- `app/controllers/api/v1/statuses_controller.rb`:
Upstream moved things around in a place where glitch-soc had support for
an extra parameter (`content_type`).
Follow upstream but reintroduce `content_type`.
* Add editing for published statuses
* Fix change of multiple-choice boolean in poll not resetting votes
* Remove the ability to update existing media attachments for now
StatusPolicy#account was renamed to StatusPolicy#current_account in
upstream. This commit renames the local-only changes to match and
augments the #show? policy spec with what we expect for local-only
toots.
