add field for Mobile Phone number (mobile/contact:mobile)

data/fields/mobile.json

@@ -0,0 +1,10 @@
+{
+    "key": "mobile",
+    "keys": ["mobile", "mobile:phone"],
+    "type": "tel",
+    "label": "Mobile Phone",
+    "placeholder": "+31 42 123 4567",
+    "terms": [
+        "phone number"
+    ]
+}

data/presets/@templates/contact.json

@@ -3,6 +3,7 @@
     "moreFields": [
         "email",
         "fax",
+        "mobile",
         "phone",
         "website"
     ],

interim/source_strings.yaml

@@ -3084,6 +3084,13 @@ en:
         # minspeed field placeholder
         placeholder: 20, 30, 40...
         terms: '[translate with synonyms or related terms for ''Minimum Speed Limit'', separated by commas]'
+      mobile:
+        # mobile=*, mobile:phone=*
+        label: Mobile Phone
+        # mobile field placeholder
+        placeholder: +31 42 123 4567
+        # 'terms: phone number'
+        terms: '[translate with synonyms or related terms for ''Mobile Phone'', separated by commas]'
       model:
         # model=*
         label: Model