Add translatable strings to collector field (#852)

Author: kjonosm

data/fields/collector.json

@@ -1,5 +1,12 @@
 {
     "key": "collector",
     "type": "semiCombo",
-    "label": "Items"
+    "label": "Items",
+    "strings": {
+        "options": {
+            "coins": "Coins",
+            "stamps": "Stamps",
+            "comics": "Comics"
+        }
+    }
 }