Network status indicator should only respect the latest / current request. Others finish in background. Replace stupid bools with an enum to track state. Be smarter about split requests.

lib/localizations/zh.json

@@ -455,7 +455,9 @@
     "timedOut": "请求超时",
     "noData": "无离线数据",
     "success": "监控数据已加载",
-    "nodeDataSlow": "监控数据缓慢"
+    "nodeDataSlow": "监控数据缓慢",
+    "rateLimited": "服务器限流",
+    "networkError": "网络错误"
   },
   "nodeLimitIndicator": {
     "message": "显示 {rendered} / {total} 设备",