[FIX] Fixed use of statusbar_visible for o2m fields. Also added some doc in the code.
[FIX] Fixed use of statusbar_visible for o2m fields. Also added some doc in the code.

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