Add spouse relationship to the Available Fields in the Export Donor Information pop-up

I want to request a feature: add relationship (or at least spouse-relationship!) to the "Available Fields" in the "Export Donor Information" pop-up. Currently, when we pull a donor report, we have to pull a separate spouse report within the Communications > Mailing Lists tab and go through one-by-one to add the spouse name to the donor report. This is incredibly inconvenient.

Related: there should be an option to add the soft credit (usually spouse) name to email and letter templates. For example, when we compose a thank you email or letter for donors, it only pulls the name of the main donor. This means that we have to manually check to see if the donation was with a soft credit and then manually add that person's name to the email or letter once it is generated.