[Larwick] Minor granularity changes and meadows

[Golfavel]

Summary

Changes granular swamps to reflect what overmap claims they are, granular isolated towers to watchtower sprite, and adds meadows

Content of the change

Connects various meadows to "two_grass_brown"
Changes:

• Vague-level swamps look like forests
• Outline and details-level swamps use swamp sprite instead of cyan tree
• Isolated towers use watchtower sprite instead of (office building) tower

Testing

Before

After

Additional information