[PM-3883] Fix ConfigService.serverConfig$ initial values and error handling (#6272)

* Always fetch ServerConfig from server, use stored value as fallback

* Handle errors in server fetch

libs/angular/src/services/jslib-services.module.ts

@@ -647,6 +647,7 @@ import { AbstractThemingService } from "./theming/theming.service.abstraction";
         ConfigApiServiceAbstraction,
         AuthServiceAbstraction,
         EnvironmentServiceAbstraction,
+        LogService,
       ],
     },
     {