Upgrade World changelog

v1.68
- Adds rotation check to the command clean_duplicates (accidentally removed some player built pieces).
v1.67
- Adds a new command clean_duplicates to remove duplicate objects.
v1.66
- Improves the speed of location distribution when biome filters are used.
v1.65
- Fixes the command vegetation_reset messing up vegetation generation until the game is restarted.
v1.64
- Fixes the command locations_remove zone removing all locations instead of the location in the current zone.
v1.63
- Adds a new parameter empty to the command zones_generate to instantly generate empty zones.
- Fixes location autocomplete not working without Server Devcommands mod.

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