Animated serverMessage display

[mattpass]

Right now we have the serverMessage function working in a way that means either the backup version count is shown or the server message. This looks absolutely fine, but not the initial design idea I had and think we can look to implement that.

Implementation:
The 123 backups counter under the editor could slide up and out of view under the editor and at the same time the server message slide in to take its place. When the message is cleared, it slides out and the 123 backups count slides back in.