<URL: http://bugs.freeciv.org/Ticket/Display.html?id=39869 >
How to reproduce:
Select 'Start new game' from the main menu, select ruleset/modpack
that defines prefered tileset, start game, quit client, start client,
select 'start new game' again. Client abort because tileset doesn't
contain default ruleset national flags!
Last used ruleset is saved along last used tileset as user prefs.
Only last used tileset is saved with user prefs so when tileset not
compatible with default ruleset becomes saved as user default, it's
impossible to start new game from the client without resolving to the
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