Make name of nmbs live sensor customizable via unique_id (#29662)

* Make name customizable for nmbs live sensors

* Change order of the live name

* Added unique id to live nmbs sensor

* Revert changing the name of the live sensor

homeassistant/components/nmbs/sensor.py

@@ -92,7 +92,7 @@ class NMBSLiveBoard(Entity):
         """Initialize the sensor for getting liveboard data."""
         self._station = live_station
         self._api_client = api_client
-
+        self._unique_id = f"nmbs_live_{self._station}"
         self._attrs = {}
         self._state = None
 
@@ -101,6 +101,11 @@ class NMBSLiveBoard(Entity):
         """Return the sensor default name."""
         return "NMBS Live"
 
+    @property
+    def unique_id(self):
+        """Return a unique ID."""
+        return self._unique_id
+
     @property
     def icon(self):
         """Return the default icon or an alert icon if delays."""