Fix issues related to saved items in mobile version
The mobile version (the site and the ios app) has some problems:
- Sometimes, saving an item to read later doesn't save the current item, saving a previous item instead
- Unmarking a saved item hides another saved items of the same day until the page is reloaded
- When a "maximized" saved item is unmarked, it's not possible to navigate to the next saved item. This issue is related to the previous one.
This is particularly annoying to everyone who save items to read later in the mobile version