Need easy to fill short description for invoice lines

We’re experiencing maximum data entry pain with invoices where, for a simple example, there is no ‘product’ being invoiced … but simply a short description is provided.
currently, one must explicitly change to the description tab which is multi-line and is only visible by going to this tab.

It would be nice to be able to enter a short description on the main form tab and use this description in the generated move lines. The multi-line description should be used as detail only being retained in the invoice (and not in the lines).

Furthermore, this description could automatically be filled in when a product is selected as it is typically the supplier’s name for the product in a supplier invoice, for instance.
This also get over the problem as mentioned

As this is also useful for sales/purchases, it would probably be useful to indicate whether the full description should be generated in the invoice where necessary.