Order of fields rendered in backend follows order of metas, not order of Inputs

[ght]

Current Behavior

The fields displayed on a submitted post are ordered as they are returned by get_post_custom().

So when reordering the Inputs passed to Formendpoint::add_fields, existing posts are still displayed with the fields in the old order.

Expected Behavior

The fields should be displayed in the same order as passed to add_fields.

(This is a known problem, the code already has a TODO comment)