[myurl] Tell the user default smart url's are loaded if no pre-existing url's found in storage
[myurl] Tell the user default smart url's are loaded if no pre-existing url's found in storage

Test Plan:
Remove all smart url's, then reload the page, so an alert is shown and default
smart url's are loaded.

hermantai/beta-programs,hermantai/beta-programs,hermantai/beta-programs