Fronted not being updated for a copy change from another collaborative user

[ozer550]

Observed behavior

When two collaborative users are working on the same channel, copy change from one user is not being reflected to another user. The backend is broadcasting the required changes but it seems like the frontend is not updating them.
(websocket branch)

Expected behavior

All collaborative users should instantly reflect copy changes made by a user connected to the same channel.

Steps to reproduce the issue

1. Create two accounts.
2. Create a test channel from one of the users.
3. Invite the other account using share channel.
4. Perform a Copy change from one of the user.
5. Other user does not reflect these copy change in his channel's state!

copyChangeBug.mp4

[bjester]

Seems we're not applying copy changes here.