[FIX] move setElement init call from WidgetMixin to Widget
[FIX] move setElement init call from WidgetMixin to Widget

Widget is the one providing both setElement and _make_descriptive...

akretion/openerp-web,havt/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web