Also support contact:* tags on Phone, Fax, Email and Website fields. closes #905

data/fields/email.json

@@ -1,5 +1,9 @@
 {
     "key": "email",
+    "keys": [
+        "email",
+        "contact:email"
+    ],
     "type": "email",
     "placeholder": "example@example.com",
     "label": "Email"

data/fields/fax.json

@@ -1,5 +1,6 @@
 {
     "key": "fax",
+    "keys": ["fax", "fax:phone"],
     "type": "tel",
     "label": "Fax",
     "placeholder": "+31 42 123 4567"

data/fields/phone.json

@@ -1,5 +1,6 @@
 {
     "key": "phone",
+    "keys": ["phone", "contact:phone"],
     "type": "tel",
     "label": "Telephone",
     "placeholder": "+31 42 123 4567",

data/fields/website.json

@@ -1,5 +1,6 @@
 {
     "key": "website",
+    "keys": ["website", "website:phone"],
     "type": "url",
     "placeholder": "https://example.com",
     "label": "Website",