Manage name of generic products
In case of using a "generic" product or a line without product, there's no information that allow to identify the line in list view... (product is empty, all text is in the description field)
Following discuss: https://discuss.tryton.org/t/how-to-manage-the-name-of-generic-products/3323
We will add a function field "Summary" that will take only the first line of description field to put this information on the list view.
This will apply on the following modules: purchase_requisition, purchase_request, purchase, sale and account_invoice