cost-details:Change order of ingest milestones
ARMS-65 Add reviewer sections to preview and pdf
ARMS-69 Add attachments and costing table to preview page
preview.py has been moved to upstream redbox

See redbox:d39325206abdebcad372ef9bb988a75604bdbdde
https://github.com/redbox-mint/redbox/commit/d39325206abdebcad372ef9bb988a75604bdbdde