fix new config not saved

EVCB_OCPP.WSServer/Service/DbService/MainDbService.cs

@@ -368,6 +368,8 @@ public class MainDbService : IMainDbService
             ConfigureSetting = string.IsNullOrEmpty(value) ? string.Empty : value,
             Exists = isExists
         });
+
+        await db.SaveChangesAsync();
     }
 
     private async Task UpdateTransactionEF(int transactionId, int meterStop, DateTime stopTime, int stopReasonId, string stopReason, string stopIdTag, string receipt, int cost)
@@ -677,6 +679,12 @@ public class MainDbService : IMainDbService
             }
             bundleHandlerData.AddCompletedData(originKey, g.ToList());
         }
+        var getConfigChargeboxIds = gReult.Select(x => x.Key);
+        var emptyConfigChargeboxIds = chargeboxIds.Except(getConfigChargeboxIds);
+        foreach (var chargeboxId in emptyConfigChargeboxIds)
+        {
+            bundleHandlerData.AddCompletedData(chargeboxId, new List<MachineConfigurations>());
+        }
     }
 
     private async Task UpdateConnectorStatusEF(string Id, ConnectorStatus Status)