Fix: lobby window doesn't close if no connection could be established #9223
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Motivation / Problem
In some cases it is possible that you could open the Lobby window, but the connection to the server could not be established. This leaves you in this weird state where the Lobby window is not receiving any company info, but also doesn't tell you the connection is not established.
Description
Drop out of the Lobby window if the connection could not be established.
Limitations
Checklist for review
Some things are not automated, and forgotten often. This list is a reminder for the reviewers.