fix nodes all showing offline

webapp/frontend/src/views/HomeView.vue

@@ -322,7 +322,7 @@ function onNodesUpdated(nodes) {
         let icon = icons.mqttDisconnected;
 
         // use offline icon for nodes older than configured node offline age
-        if (nodesOfflineAge) {
+        if (nodesOfflineAge.value) {
             const lastUpdatedAgeInMillis = now.diff(moment(node.updated_at));
             if (lastUpdatedAgeInMillis > nodesOfflineAge.value * 1000) {
                 icon = icons.offline;