Add ability to mark/unmark GL lines for 1099's on vendor setup

It would be very helpful on vendors who have coding lines that should not receive a 1099. Example, paying rents and reimbursing expenses - if we could mark the vendor's Rent Exp for 1099s and Unmark the expense reimbrusement coding lines in the vendor setup, then we wouldn't have to remember to do that each month when processing the payments.

If the Define Vendor Main page mirrored the Enter Invoice page, that would be wonderful.