I have a different issue. I get revenue via invoices that relates to specific projects. For example, some have sponsors who provide funding; I have to invoice the donations and keep track of them via the customer/sponsor. Alas, that means I can't track them directly in the project. I created a workaround with tags that helps me group them, but I have to add them into the financial calculations manually. A dropdown for "project" on the invoice creation page would be great. It might also solve the problems listed above.
