Introducing sortable product properties.
Fix routes syntax in product_properties.
Fix data-sortable-link path since route is namespaced
fix api spec to reflect on column addition.
attempt to fix api spec.
Revert "attempt to fix api spec."

This reverts commit bdcaa8c353b16b461db5ebb875a23ff0ab5f53e5.
Revert "fix api spec to reflect on column addition."

This reverts commit ade8897a675c3535e8c1ff25d5e4b1f0594eebb6.
Updating product_properties api spec.