show-tileset-diffs: Ignore DEAD_PICKED_TILE
Manual harmonisation of plant raws across tilesets.

All tilesets except Phoebus, Obsidian Soul, and Masterwork tilesets
are affected.
Merge branch 'harmonize_raws' into unified

* harmonize_raws:
  Manual harmonisation of plant raws across tilesets.
  show-tileset-diffs: Ignore DEAD_PICKED_TILE