Allow to see rooms of incompatible versions in the lobby
For the new clients the room version is shown in a separate column.
There is also a hack for previous versions clients: the room vesion
specifier is prepended to the room names for rooms of incompatible versions,
and the server shows 'incompatible version' error if the client tries to join them.
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