Reference TMs and HMs by move instead of number (#1732)

data/maps/Route111/map.json

@@ -261,8 +261,8 @@
       "movement_range_y": 0,
       "trainer_type": "TRAINER_TYPE_NONE",
       "trainer_sight_or_berry_tree_id": "0",
-      "script": "Route111_EventScript_ItemTM37",
-      "flag": "FLAG_ITEM_ROUTE_111_TM37"
+      "script": "Route111_EventScript_ItemTMSandstorm",
+      "flag": "FLAG_ITEM_ROUTE_111_TM_SANDSTORM"
     },
     {
       "graphics_id": "OBJ_EVENT_GFX_BERRY_TREE",