Added ProgressIndicator and Error Message

lib/Widgets/flood_station_list_view.dart

@@ -11,7 +11,11 @@ class FloodStationListView extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ListView.builder(
+    return ListView.separated(
+      separatorBuilder: (context, index) => Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 15.0),
+        child: Divider(),
+      ),
       itemBuilder: (context, index) {
         final item = _stations.elementAt(index);
         return ListTile(