Add feature to manually split a Giving Hub donation among donors
In the past year, I have received 3 donations through out Giving Hub (via credit card on Stripe). Once, the donor wrote in their message that this donation was mean to be split in half, with the tax receipts going to two different people. Twice, the donors then called me right after and said they donated for themselves and on behalf of someone else, and they give me direction on who the donation receipt should go to. However, it does not seem possible to split a Giving Hub donation among various donors manually - but given the demand at my organization, this seems like a feature that should be possible manually from the back-end.
In these cases, I have to go back to the donor and tell them that I will either give them the tax receipt for the whole thing, or I will refund them and they can then send a e-transfer, which I can easily break into donations from two people. This is a big hassle for the donors, and I want to avoid making the donors do any extra work other than sending the donation in the first place.
