Add translatable strings to artwork_type field (#700)

Author: kjonosm

data/fields/artwork_type.json

@@ -1,5 +1,18 @@
 {
     "key": "artwork_type",
     "type": "combo",
-    "label": "Type"
+    "label": "Type",
+    "strings": {
+        "options": {
+            "sculpture": "Sculpture",
+            "statue": "Statue",
+            "mural": "Mural",
+            "installation": "Art Installation",
+            "graffiti": "Graffiti",
+            "bust": "Bust",
+            "painting": "Painting",
+            "mosaic": "Mosaic",
+            "relief": "Relief"
+        }
+    }
 }