UX: On first load of notifications don't use cached data

app/assets/javascripts/discourse/mixins/stale-local-storage.js.es6

@@ -1,6 +1,8 @@
 import StaleResult from 'discourse/lib/stale-result';
 import { hashString } from 'discourse/lib/hash';
 
+var skipFirst = true;
+
 // Mix this in to an adapter to provide stale caching in our key value store
 export default {
   storageKey(type, findArgs) {
@@ -11,11 +13,15 @@ export default {
   findStale(store, type, findArgs) {
     const staleResult = new StaleResult();
     try {
+      if (!skipFirst) {
         const stored = this.keyValueStore.getItem(this.storageKey(type, findArgs));
         if (stored) {
           const parsed = JSON.parse(stored);
           staleResult.setResults(parsed);
         }
+      } else {
+        skipFirst = false;
+      }
     } catch(e) {
       // JSON parsing error
     }