Summaries & More TPAC display

On our recent distribution of Evergreen, (2.7.X on Debian), there is an issue displaying multiple 520 fields in the Summaries & More section. I was able to include certain subfields by altering the misc_util.tt2 file:

This is the misc_util.tt2 file in the templatesdirectory before my edits:

args.summaries = [];
        FOR sub IN xml.findnodes('//*[@tag="520"]/*[@code="a"]');
            args.summaries.push(sub.textContent);
        END;
        args.summary = (args.summaries.size) ? args.summaries.0 : '';

Notice here in the file that it does not carry the subfield “c”….so I "fixed" this by adding the subfield c to that it shows up:

args.summaries = [];
        FOR sub IN xml.findnodes('//*[@tag="520"]/*[@code="a" or @code=”c”]');
            args.summaries.push(sub.textContent);
        END;
        args.summary = (args.summaries.size) ? args.summaries.0 : '';

However, there's not a whole lot of granular control over how the extra subfields show up in the TPAC. It might be nice to have this broken out into other TT2 files rather than having things auto-generated.