FIX: waits libs (highlightjs) to process post before acting

common/header.html

@@ -202,6 +202,7 @@
         }, 250)
       );
     
+    Ember.run.later(() => {
       // trigger fake event to setup initial state
       Object.keys(placeholders).forEach(placeholderKey => {
         const placeholder = placeholders[placeholderKey];
@@ -218,5 +219,6 @@
           mappings
         );
       });
+    }, 500);
   });
 </script>