Login failure messages displayed for too short

[lmoureaux]

When failing to log in for some reason, a message is displayed at the bottom of the network page, but it disappears too quickly to read it. We'd need a better way of displaying failures, but in the meantime we should consider increasing the timeout.

I think this is where the timeout is set:

freeciv21/client/fc_client.h

Line 118 in 76f8524

void set_status_bar(const QString &str, int timeout = 2000);