KST-18: change const vars to consts

src/app/core/service-list/service-list.component.ts

@@ -90,9 +90,9 @@ export class ServiceListComponent implements OnInit {
       return [];
     }
     services.sort((a, b) => a.isOkay > b.isOkay ? 1 : a.isOkay === b.isOkay ? 0 : -1);
-    let nameCompare = (a, b) => a.name.localeCompare(b.name, "hu");
-    let sortedFailingServices = services.filter(s => s.isOkay === false).sort(nameCompare);
-    let sortedHealthyServices = services.filter(s => s.isOkay === true).sort(nameCompare);
+    const nameCompare = (a, b) => a.name.localeCompare(b.name, "hu");
+    const sortedFailingServices = services.filter(s => s.isOkay === false).sort(nameCompare);
+    const sortedHealthyServices = services.filter(s => s.isOkay === true).sort(nameCompare);
     return sortedFailingServices.concat(sortedHealthyServices);
   }