Persistence Force-Autoload-GM

Override for GameMaster Game Mode to force-autoload the previous savegame for the current scenario.

Should not be necessary any more once -loadSessionSave param for dedicated servers are fixed, but could be useful for "fully persistent" game modes intended to autoload on startup by default.

- You will still need to make sure you have persistence setup correctly within your server config, and
- Have GameMasterSystems.conf added to the Systems Config section within your Mission header within your mission mod.


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