Feature Request: Filter by Parent in Post / Loop Modules

It would be really great to be able to filter the Posts and/or Loop modules by parent, so you could easily all of a page’s subpages, for example.

I assume this wouldn’t be terribly difficult, since WP_Query already supports post_parent as one of its arguments, right? Is there a possibility this could be added in a future update?

Currently whenever I need to do this I either need to crack open the template files or find a plugin just for this one tiny thing and it gets on my nerves hehe. Would be so nice to be able to do it right in BB.

Thanks!