[Notebook] Fix link formatting on load, remove duplicate snapshot indicator (#6317)

* adding urlWhitelist to data so when/if it is updated it triggers link formatting

* removing dupe notebook and restricted notebook checks and just moving it to base notebook functionality install checks

* nullthing to see here

src/plugins/notebook/components/NotebookEntry.vue

@@ -235,7 +235,8 @@ export default {
         return {
             editMode: false,
             canEdit: true,
-            enableEmbedsWrapperScroll: false
+            enableEmbedsWrapperScroll: false,
+            urlWhitelist: null
         };
     },
     computed: {