ArchivesSpace: Only send changed information
ArchivesSpace: Only send changed information

When editing an ArchivesSpace record, only send the information that could
have been changed in the form. Otherwise, the extraneous data causes problems
like cyclic dependencies when serializing and unchanged data incorrectly
populated.

refs #10864

djpillen/appraisal-tab,artefactual-labs/appraisal-tab,djpillen/appraisal-tab,artefactual-labs/appraisal-tab