Create ability to select Phase for commitments sent to Sage 100/300

I have clients who use the phase function in 100 (and I heard this is similar in 300) to track their costs more narrowly and they indicate that not being able to track costs like this is a potential deal breaker. I could see globally-created category drop-down menu for those with 100/300 selected as their accounting systems. Hopefully, this is something that would push across HH2 easily.