Lobby 2.5 fix

- Add Changelog dialog
- Remove temp debug message
- Remove temp change size chat
- Fix connection message
- Fix "CH" flag country
- Fix "VA" flag country
- Replace the "world" flag country
- Fix yellow country
- The ConnectDialog lasts until the lobby is fully loaded

Waiting before accept, contact me here.
I would much prefer that we keep things like this out of the ingame lobby.

Changelogs/news, especially about the patch belongs elsewhere. We could have a link to it though, since the game does allow opening these through shellexecute :)