Show values for text and rich text custom attributes in modals

@reciprocitylaran this is work in progress, but it should display values for text and rich text custom attributes in modals. Sharing the half finished state because you might find it useful when debugging/working on save functionality.
There's a bug in this. When creating a new Audit from the Program page this.instance is undefined, so GGRC.page_instance() is used. However, this returns a program. So, the lines below return attribute definitions for the program. I'm going to see if I can figure out how to resolve this.