Fix incorrect uvs path

Author: STBrian

main.py

@@ -412,9 +412,9 @@ def __init__(self):
         # --------------------------------------------
 
         # Load indexes of blocks and items from source
-        with open("./assets/uvs/atlas.items.vanilla.uvs.json", "r") as f:
+        with open(os.path.join(self.app_path, "assets/uvs/atlas.items.vanilla.uvs.json"), "r") as f:
             self.items = json.load(f)
-        with open("./assets/uvs/atlas.terrain.vanilla.uvs.json", "r") as f:
+        with open(os.path.join(self.app_path, "assets/uvs/atlas.terrain.vanilla.uvs.json"), "r") as f:
             self.blocks = json.load(f)
 
         # Load resources