New functionality:
* A new attribute called minimum has been added to the products.
* In the shopping list, those products that are at or below the minimum will be added.
* For those products that are added below the minimum, what is the minimum will appear.
** Please, all products already introduced have no minimum, you just have to edit them and add the minimum.

Error correction:
* Fixed an error that only came to show 15 items in the list.