More controller specs (#2561)

* 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

spec/controllers/settings/exports/blocked_accounts_controller_spec.rb

@@ -1,6 +1,8 @@
 require 'rails_helper'
 
 describe Settings::Exports::BlockedAccountsController do
+  render_views
+
   before do
     sign_in Fabricate(:user), scope: :user
   end