Add item packs

[davi024]

If you buy a pack of 12 bulbs, it is a bit heavy to add the 12 bulbs one by one. It would be nice to be able to add the 12-pack at once with general data such as total price or characteristics and for the program to automatically generate 12 items where you can choose the location of each one, the serial number or the unit price that could be calculated automatically .