Add fields building_area, access_simple, lit, indoor to horse_walker.json

Author: Hufkratzer

data/presets/animal/horse_walker.json

@@ -1,10 +1,14 @@
 {
     "icon": "temaki-amusement_park",
     "fields": [
-        "covered"
+        "building_area",
+        "covered",
+        "access_simple"
     ],
     "moreFields": [
         "operator",
+        "lit",
+        "indoor",
         "capacity"
     ],
     "geometry": [