It works, but looks a bit hacky IMO :) Maybe we can make it more verbose and obvious? Something like this: 
```
.edit #messages-compose-form {
  display: none;
}

.edit #composer-messages-container { // or join with the rule above " .edit .edit-container > :last-child"
  margin-bottom: 7rem;
}
```
Seems that CSS rule above does something similar, but for the thread list view.