Allow association of specific income account with individual project tasks.
We track our income on a more granular level than "sales." However, we must manually adjust the associated income account for each line item in an invoice (because we itemize individual days of work). It would be nice if, when a project is created, individual tasks could be pre-associated with income accounts. "Sales" would presumably be the default, as many organizations most likely do collect all income under this account. For those that do not, such as ours, this would mean that we would have fewer steps to handle bookkeeping when we submit invoices.