[BUG] Reply to Thread with audio or image doesn't work

Steps to reproduce: 
- open Room View screen
- long press on text message
- choose Reply in actionsheet
- record audio/attach photo file
- click Send

Expected: new reply is added to text message.
Actual: nothing happens.

- Your Rocket.Chat Experimental app version: 1.12.0.6971
- Your Rocket.Chat server version: open.rocket.chat
- Device (or Simulator) you're running with: Iphone SE
