1. Enhance the button "Initial Shopping List …", create cards only for
new user
2. Support to "Start shopping" menu 
3. Enhance the card update logic, use "PATCH" instead of "UPDATE", can
save our mirror calls and improve the performance
4. Hide the "Debug Block" when deploy to server
5. Enhance the "Delete" item function in our app, previously it will
only delete the item in timeline, now it will delete the records in our
internal database as well.