Unciv

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Large memory performance improvements for large maps

Modding: show exact location of json file errors

By SomeTroglodyte:
- Context menu visual indicators
- Modding: Fixed 'empty name' problems
- Fix expansion clearing barbarian camps leaving obsolete quests
- City buy tile context menu, to buy several tiles at once

Avoid centering on hidden wonder locations - By xplon

Respect alternative promotion prerequisites in validation - By superdusto