bugfixing: breadcrumb in dual panel mode

app/templates/authenticated/nodes.hbs

@@ -13,7 +13,7 @@
       <Viewer
         @doc={{@model.extra.doc}}
         @pages={{@model.extra.pages}}
-        @extranode={{this.extranode}}
+        @extranode={{@model.current_node}}
         @onPanelToggle={{this.onPanelToggle}}
         @dualPanelMode={{this.dualpanel_mode}}
         @hint="right" />