The simple app where a user ranks countries that they like the most.
- Suggest UX improvements
- A user can reorder list items using drag-and-drop
- A user can select a country when they click on a plus button
- The app should sync with back-end as soon as possible
- A user can replace selected country by a country that isn't selected
- A user should be able to remove a country from selection
- If a user leaves the page a list should be saved before unmount.
Important: don't create new components