IdTech1Converter|MapInfoTranslator: Swap sky layers when "double sky" is set
Renderer|SkyDrawable: Fix sky sphere layer fadeout

A refactoring oversight due to misinterpretation of the old logic.
libcommon: Fix logging of game state config in NetSv_SendGameState

The game and episode identifiers are now AutoStrs so that they can
be written directly to the GPT_GAME_STATE packet.