Campaign savegames are broken

Testing requirements:

• Do vanilla savegames work without addons? Should be yes
• Do vanilla savegames work with addons? Should be no
• Do mod savegames work without addons? Should be yes
• Do mod savegames work with addons? Should be no

Here are the results after !433 (merged)

1. Yes
2. No
3. Yes
4. No

closed