UPD correctly sort maint states

type: fqdnSelections
    }

frontend/src/api-services/system_info.service.js

@@ -22,6 +22,6 @@ export default {
     return Axios.get('/api/alerts.json?' + Math.random().toString())
   },
   getMaintenance() {
-    return MaintService.list(undefined, {sorting_params_list: ['is_active', 'ts_begin']})
+    return MaintService.list(undefined, {sorting_params_list: ['is_active DESC', 'ts_begin ASC']})
   }
 }