- Moved logic from TGO to TheaterGroup and Unit, cleanup
- Fixed an issue with wrong radar threat zone calculation
- Correctly handle dead and alive units in threat calculation (dead units are no more threats...)
- Fixed wrong air_defenses threat zone used for planning (now uses aa-capable tgos instead of all tgos for the CP)
- Remove the might_have_aa property from TGOs and actually check if there is any aa-capable unit present (this is needed as with the recent tgo refactor all type of TGOs can also have anti air units if they have some defined in the layout)