Desktop: Fix datetime values not appearing on note properties when the picker is open

[pedr]

Summary

When adding the react-datetime I end up not properly testing, introducing the bug where the datetime value is not visible when the datetime-local picker is open. To fix that I removed all the values transformation adding the date/time format chosen by the user only when the value is being shown.

After the fix:

Testing

1. Open Note Properties
2. Press on the edit button on Created, Updated or Completed
3. See if the date picker is set to the correct date and time

[personalizedrefrigerator]

This mostly looks good to me! I've left two minor comments.

[pedr]

• Look at refactor: key.indexOf('_time') >= 0 || key === 'todo_completed'