Show catchup progress even in game

[henke37]

It's no secret that some clients will fall behind once in a while after the initial connection catch up.

The game resolves this situation in the simplest, yet most logical way possible. It simply disables local input and starts updating as fast as it can.

However, the player isn't told this. There is no progress bar to track how close the client is to catching up with the server again.

[ssilk]

Added to viewtopic.php?f=80&t=32968 Collection of Of Ideas around Multiplayer: Lobby-Features, Joining, Mod&Game-Loading, ...