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.
Right. But if it's nil (It wasn't there), attempting to index [1] will be an error. We just need this:

```
local language = GetCommandLineArg("/country", 1)
local PrefLanguage = "world"
if language then
    PrefLanguage = string.lower(tostring(language[1]))
end
```