Fixed missing rotation mapping for arctic continent.

Refactor Session to MapTemplate

Add multi element dragging

- Update FileDBReader and FileDBSerializer to 2.4.1
- Update FileDBModels to 0.3
- FixedIslandRepository uses FileDBModel for loading instead of directly accessing the tags and attribs. Also added some null field/error handling, because the old code just expected the tags and attribs to be properly formed.

To properly allow off-center PlayableArea

Rebased and deemed approved.

… assets.

…addition of RegionIdReferenceAttribute.

Extracted GuidReferenceResolverFactory from AssetRepository.
Moved Ambiente definition to RegionAsset.

Change MapTemplate to belong to a SessionAsset instead of RegionAsset.
Remove Region.
Removed fake MapType for The New World for A future fix.
Temporarily disable Mod export for a future fix.

…reflect the session's name instead of the DLC.

Extract ModWriter from Mod.
Clean up ModWriter.
Add support for exporting Cape Trewlaney, Arctic and Enbesa mods.

Add DataPath and ModsPath as separate UserSettings.
Refactored DataArchive and mod export to use the new settings.

…ataManager.

Remove async logic from within Repositories and DataArchive for simpler setup.

Add EnableExpertMode setting.

…ataManager.

Remove async logic from within Repositories and DataArchive for simpler setup.

Add EnableExpertMode setting.

…ds/AnnoMapEditor into feature/add_start_window