Add no:network to charging stations

assets/themes/charging_stations/charging_stations.json

@@ -53,6 +53,16 @@
             "key": "network"
           },
           "mappings": [
+            {
+              "if": {
+                "and": [
+                  "no:network=yes"
+                ]
+              },
+              "then": {
+                "en": "Not part of a bigger network"
+              }
+            },
             {
               "if": {
                 "and": [