Payments by Family should display Head of Household Name

[crossan007]

#336 will fully resolve the ambiguity of assigning payments to the correct family; however the change is large, and I have not yet addressed it.

In the interim, displaying the Head of Household in the family selector drop down will help ensure that the correct family is attributed the payment.

I.e.
Currently, the family dropdown may display 5 "smith" families.
Displaying the family name, along with the Head of Household name will help to disambiguate the family to which the payment is attributed.

[crossan007]

@gyphon reported this to me via Gitter.