refactor form error handling:
* almost everything is in the base form class, with other form errors related code
* deprecate form_field_error in favor of field_error and format_error on the renderer
* fix pb with js localization of errors by properly using field.role_name()
* rename 'errors' into 'error' in forminfo to avoid confusion
from logilab.common.deprecation import class_renamed, class_moved
from cubicweb.server import hook
SystemHook = class_renamed('SystemHook', hook.Hook)
PropagateSubjectRelationHook = class_renamed('PropagateSubjectRelationHook',
hook.PropagateSubjectRelationHook)
PropagateSubjectRelationAddHook = class_renamed('PropagateSubjectRelationAddHook',
hook.PropagateSubjectRelationAddHook)
PropagateSubjectRelationDelHook = class_renamed('PropagateSubjectRelationDelHook',
hook.PropagateSubjectRelationDelHook)
Hook = class_moved(hook.Hook)