Themes: add support for operator:email, mostly for velopark

assets/layers/bike_parking/bike_parking.json

@@ -795,6 +795,19 @@
         }
       ]
     },
+    {
+      "id": "operator_email",
+      "question": {
+        "en": "What is the email address of the operator of this bicycle parking?",
+        "nl": "Wat is het emailadres van de beheerder van deze parking?"
+      },
+      "icon": "./assets/svg/envelope.svg",
+      "freeform": {
+        "key": "operator:email",
+        "type": "email"
+      },
+      "render": "<a href='mailto:{operator:email}' target='_blank' rel='noopener'>{operator:email}</a>"
+    },
     {
       "question": {
         "en": "Does this bicycle parking have spots for cargo bikes?",

assets/layers/icons/icons.json

@@ -167,12 +167,18 @@
           "#": "ignore-image-in-then",
           "if": "contact:email~*",
           "then": "<a href='mailto:{contact:email}'><img textmode='✉️' alt='email' src='./assets/layers/questions/send_email.svg'/></a>"
+        },
+        {
+          "#": "ignore-image-in-then",
+          "if": "operator:email~*",
+          "then": "<a href='mailto:{operator:email}'><img textmode='✉️' alt='email' src='./assets/layers/questions/send_email.svg'/></a>"
         }
       ],
       "condition": {
         "or": [
           "email~*",
-          "contact:email~*"
+          "contact:email~*",
+          "operator:email~*"
         ]
       }
     },

assets/layers/questions/questions.json

@@ -266,6 +266,12 @@
           "icon": "./assets/svg/envelope.svg",
           "then": "<a href='mailto:{contact:email}' target='_blank' rel='noopener'>{contact:email}</a>",
           "hideInAnswer": true
+        },
+        {
+          "if": "operator:email~*",
+          "icon": "./assets/svg/envelope.svg",
+          "then": "<a href='mailto:{operator:email}' target='_blank' rel='noopener'>{operator:email}</a>",
+          "hideInAnswer": true
         }
       ],
       "freeform": {