add entrance=shop value also to shop field, see #1299 (#1446)

Author: tyrasd

data/fields/entrance.json

@@ -8,6 +8,7 @@
             "main": "Main",
             "secondary": "Secondary",
             "service": "Service",
+            "shop": "Shop Entrance",
             "exit": "Exit Only",
             "entrance": "Entrance Only",
             "emergency": "Emergency Exit",