[FIX] re-enable delete button for o2m list items
[FIX] re-enable delete button for o2m list items

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