An editable list can be drag-and-drop sorted by:
- displaying a sequence field,
- displaying a field with the `handle` widget
At first it was only working if the list was not specifically ordered,
but with 26bf35260 it also worked if the list was ordered on `sequence`
or `sequence ASC`.
This commit changes this so it works:
- if the list is not ordered (same as the original intention),
- if the list is ordered by the sequence field (widget `handle` or sequence)
This allows to have a custom model (on which we can't define _order) to be
ordered on a custom field.
This also remove a far-fetched oddity such as having the view ordered by
sequence but having a custom sequence field before `sequence`.
opw-704612
Nicolas Lempereur
2d753ab5ec