Use backend rescan summary in group editor

test/test_support.dart

@@ -36,6 +36,7 @@ class FakeIgnisApi extends IgnisApi {
   Object? eventLogData;
   Object? apiKeysData;
   Object? authData;
+  Object? rescanNetworkData;
 
   Object? devicesError;
   Object? scenesError;
@@ -329,7 +330,17 @@ class FakeIgnisApi extends IgnisApi {
     if (error != null) throw error;
     return Response(
       requestOptions: RequestOptions(path: '/devices/rescan'),
-      data: <String, dynamic>{'ok': true},
+      data:
+          rescanNetworkData ??
+          <String, dynamic>{
+            'status': 'ok',
+            'found': 0,
+            'added': 0,
+            'updated': 0,
+            'removed_offline': 0,
+            'pending_removal': 0,
+            'online': 0,
+          },
     );
   }
 }