Add healthcheck widget

public/locales/en/common.json

@@ -354,6 +354,16 @@
         "child_bridges": "Child Bridges",
         "child_bridges_status": "{{ok}}/{{total}}"
     },
+    "healthchecks": {
+        "new": "New",
+        "up": "Online",
+        "grace": "In Grace Period",
+        "down": "Offline",
+        "paused": "Paused",
+        "status": "Status",
+        "last_ping": "Last Ping",
+        "never": "No pings yet"
+    },
     "watchtower": {
         "containers_scanned": "Scanned",
         "containers_updated": "Updated",