Just giving the client an 'ok' response. It seems that it does use updateQuest to manage the state itself mostly, just the server and webui are a bit confused about a quest with all stages completed still being active.
Re #1323
Reviewed-on: #2461
Co-authored-by: Sainan <63328889+Sainan@users.noreply.github.com>
Co-committed-by: Sainan <63328889+Sainan@users.noreply.github.com>
