Add grafana stats

public/locales/en/common.json

@@ -485,6 +485,8 @@
         "time": "Time"
     },
     "grafana": {
+        "dashboards": "Dashboards",
+        "datasources": "Data Sources",
         "totalalerts": "Total Alerts",
         "alertstriggered": "Alerts Triggered"
     }