Don't allow replying to a deleted post
Steps to reproduce
- Someone makes a post
- You see it on the TL
- Person deletes the post
- You still have the post on the TL because I don't use streaming or w/e
- I reply to the post
Expected behaviour
- Pleroma sees I try to reply to a deleted post and doesn't allow it
Current behaviour
- Pleroma doesn't care that the post is deleted and let's it through any how