Add support for QNAP instances with multiple volumes (#1528)

* Add support for pfSense API

* Fix linting issues

* remove a line

* rename cpu to load in default block

* Re-order container blocks to ensure defaults show

* clean up

* Add support for multiple volumes as well as defining the volume you want to track

* QNAP widget syntax corrections, translate invalid

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Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

public/locales/en/common.json

@@ -175,7 +175,9 @@
         "cpuUsage": "CPU Usage",
         "memUsage": "MEM Usage",
         "systemTempC": "System Temp",
-        "poolUsage": "Pool Usage"
+        "poolUsage": "Pool Usage",
+        "volumeUsage": "Volume Usage",
+        "invalid": "Invalid"
     },
     "deluge": {
         "download": "Download",