fixed race condition during adding new gateway connector with default config

ui-ngx/src/app/modules/home/components/widget/lib/gateway/dialog/add-connector-dialog.component.ts

@@ -93,8 +93,7 @@ export class AddConnectorDialogComponent extends DialogComponent<AddConnectorDia
           this.dialogRef.close(value);
         }
       });
-    }
+    } else if (this.connectorForm.valid) {
-    if (this.connectorForm.valid) {
       this.dialogRef.close(value);
     }
   }