clears notif number from title when marking as read

src/components/notifications/notifications.js

@@ -26,6 +26,7 @@ const Notifications = {
   watch: {
     unseenCount (count) {
       this.$store.dispatch('setPageTitle', `(${count})`)
+      if (count==0) this.$store.dispatch('setPageTitle', '')
     }
   },
   methods: {