add ambulance station preset, improve artwork preset

data/presets/fields/artist.json

@@ -0,0 +1,5 @@
+{
+    "key": "artist_name",
+    "type": "text",
+    "label": "Artist"
+}

data/presets/fields/artwork_type.json

@@ -0,0 +1,5 @@
+{
+    "key": "artwork_type",
+    "type": "combo",
+    "label": "Type"
+}

data/presets/presets/emergency/ambulance_station.json

@@ -0,0 +1,14 @@
+{
+    "fields": [
+        "operator"
+    ],
+    "geometry": [
+        "area",
+        "point",
+        "vertex"
+    ],
+    "tags": {
+        "emergency": "ambulance_station"
+    },
+    "name": "Ambulance Station"
+}

data/presets/presets/tourism/artwork.json

@@ -1,4 +1,8 @@
 {
+    "fields": [
+        "artwork_type",
+        "artist"
+    ],
     "icon": "art-gallery",
     "geometry": [
         "point",
@@ -9,4 +13,4 @@
         "tourism": "artwork"
     },
     "name": "Artwork"
-}
+}