* Run rubocop --autocorrect on app/, config/ and lib/, also manually fix some remaining style issues
* Run rubocop --autocorrect-all on db/
* Run rubocop --autocorrect-all on `spec/` and fix remaining issues
* 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.