added key "model" to the ticket validator preset

I added the key "model" in "more Fields" to it, see PR #584

Author: Elefant-aus-Wuppertal

data/presets/amenity/ticket_validator.json

@@ -9,6 +9,7 @@
         "covered",
         "indoor",
         "level",
+        "model",
         "support"
     ],
     "geometry": [