[editcontroller] backout (sort of) removal of entity.complete() in validate_form entity is passed to js callbacks when there's one. In that case, we want as much information as we can. The removal was there to avoid complete to fail when all constraints (required relations / attributes) aren't satisfied. This fix only does the complete() after the commit is done, any ValidationError should have been raised at this point.

addressbook
basket
blog
book
calendar
comment
company
email
file
folder
i18ncontent
keyword
link
mailinglist
person
tag
timeseries
vcsfile