Directly render the feedback_thanks template

Instead of redirecting to a new route

vroom.pl

@@ -917,12 +917,9 @@ post '/feedback' => sub {
               comment => $comment
             )
   );
-  $self->redirect_to($self->get_url('feedback_thanks'));
+  return $self->render('feedback_thanks');
 };
 
-# Route for the thanks after feedback form
-get 'feedback_thanks' => 'feedback_thanks';
-
 # Route for the goodbye page, displayed when someone leaves a room
 get '/goodbye/(:room)' => sub {
   my $self = shift;