https://github.com/chryton/Shopify-Utilities/blob/master/js/custom_fields_migrator.js - [ ] Autodetect if on a product/collection ID admin and insert the updated product/collection ID - [ ] Discovery: can using JSONP between store admins work to AJAX the data over? - [ ] Fix migrating shop-level fields (probably just a sensible default to shop as `urlPart` would suffice for a short-term fix)
https://github.com/chryton/Shopify-Utilities/blob/master/js/custom_fields_migrator.js
urlPartwould suffice for a short-term fix)