Add payment options to toilet, isolate tagrendering-override

Models/ThemeConfig/WithContextLoader.ts

@@ -85,7 +85,7 @@ export default class WithContextLoader {
                     )}\n    If you intent to output this text literally, use {\"render\": <your text>} instead"}`;
                 }
                 if (renderingJson["override"] !== undefined) {
-                    sharedJson = Utils.Merge(renderingJson["override"], sharedJson)
+                    sharedJson = Utils.Merge(renderingJson["override"], JSON.parse(JSON.stringify(sharedJson)))
                 }
                 renderingJson = sharedJson
             }

assets/layers/toilet/toilet.json

@@ -227,6 +227,10 @@
             },
             "id": "toilet-charge"
         },
+        {
+            "builtin": "payment-options",
+            "override": {}
+        },
         {
             "id": "toilets-wheelchair",
             "question": {