Fixes issue-47923: Improve order of fields according to their fieldgroup

This merge request addresses a problem where field belonging to a given fieldgroup are "split" when another fieldgroup is rendered between them. For instance, given this configuration...

... the fields used to be rendered like this, note that the fields belonging to the "More Information" fieldgroup are split in two, because the fields that belong to the "Status" fieldgroup are rendered in between.

This will be the field layout once this MR is merged, note that now there is only a single More Information fieldgroup that contains all the fields that belong to that group:

Passes try: https://builds.openbravo.com/job/try-init/1089/console