Add Nextcloud widget

public/locales/en/common.json

@@ -489,5 +489,12 @@
         "datasources": "Data Sources",
         "totalalerts": "Total Alerts",
         "alertstriggered": "Alerts Triggered"
+    },
+    "nextcloud": {
+        "cpuload": "Cpu Load",
+        "memoryusage": "Memory Usage",
+        "freespace": "Free Space",
+        "activeusers": "Active Users",
+        "shares": "Shares"
     }
 }