Preset "stolperstein": update field/moreField

- having "image" visible when the "wikimedia_commons" from moreFields is shown looks wrong, so now both are optional
- reorder fields

data/presets/historic/memorial/stolperstein.json

@@ -3,15 +3,15 @@
     "fields": [
         "name",
         "inscription",
-        "wikidata",
-        "image"
+        "wikidata"
     ],
     "moreFields": [
-        "subject/wikidata",
-        "website",
-        "wikimedia_commons",
         "memorial/addr",
-        "address"
+        "address",
+        "subject/wikidata",
+        "image",
+        "wikimedia_commons",
+        "website"
     ],
     "geometry": [
         "point",