Fix remote follow (#2547)

* Add coverage for remote_follow#new

* Fix reference to authorize_follows/card partial

spec/controllers/remote_follow_controller_spec.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe RemoteFollowController do
+  render_views
+
+  describe '#new' do
+    it 'returns a success' do
+      account = Fabricate(:account)
+      get :new, params: { account_username: account.to_param }
+
+      expect(response).to have_http_status(:success)
+    end
+  end
+end