Update notes for 4.5.2021

- Content: Added descriptions and names to a number of new objects.
- UI: There is now a dedicated upgrade-objective. Clicking on the objective will take you to a building you can upgrade.
- Misc/Modding: Added ActorInfo→VisionRange.
- Fixed: Ore crushing tutorial not completing.
- Fixed: Custom map screen too big in 5:4 resolution.
- Fixed: Make-Happy objective triggering too early in some cases.
- Fixed: Buildings that are only supposed to be created via upgrading being buildable via the encyclopaedia.
- Fixed: Buildings that have not been unlocked yet being buildable via the encyclopaedia.
- Fixed: Removed date milkshake from mission 3.
- Fixed: There is now at least one reindeer on ice biomes.