Added some fixes for vanilla roads:
Fixed stairs rotation textures (texture rotated with shape)
Fixed collusion and selection box (has animals bug)
Added the bottom part of the texture to visually connect the textures with the bottom block (when placing the road on the road / stairs on the full block, free space / bottom block was visible)
Changed stairs shape to lowered
Added the snow level to blocks and slabs (vanilla 1.14.3+)
For compatibility, vanilla roads are saved as Old stone path with the ability to convert. Also they have a full block shape
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