Give The Ability to NOT Group Nominal Postings When Posting Invoicing Module Invoices

Some customers like the invoicing module and the freedom it gives them, particularly to specify nominal codes against each item line which you cannot do within the Enter Sales Free Text Invoice screen. However invoicing has been programmed to group postings with the same nominal account and just make one posting.

Instead of posting three lots of NL postings the amounts for NL code 06100 are grouped:

Would it be possible to add an Invoicing module setting & Group Item Line Nominal Codes on Invoice Lines into one NL posting - Tickbox - default Yes - can be unticked?