message: Allow robots and buildings to be placed at view edge
  Fix off by 1 error. Previously the lower left and lower right edges were
  not considered viewable, even though they were being visibly drawn. This
  prevented items from being placed on those tiles.
diff: @@ -554,7 +554,7 @@ Tile* TileMap::getVisibleTile(NAS2D::Point<int> position, int level)
  bool TileMap::isVisibleTile(NAS2D::Point<int> position, int z) const
  {
  - if (!NAS2D::Rectangle{mMapViewLocation.x, mMapViewLocation.y, mEdgeLength - 1, mEdgeLength - 1}.contains(position))
  + if (!NAS2D::Rectangle{mMapViewLocation.x, mMapViewLocation.y, mEdgeLength, mEdgeLength}.contains(position))
  {
  return false;
  }
  