* Do not show confirmation modal if deleting bookmark from list unless the bookmark has a reminder
* Remove the deleted bookmark from the in-memory array for the user list so a full reload of the list is not needed and scrolling is maintained
* Bookmarks with reminders is a core feature now, no need to have a separate URL
* Keep around the old /u/:username/activity/bookmarks-with-reminders route for backwards compat in Ember but just redirect to user activity bookmarks.