[FIX] All browser problems with left menu.
[FIX] All browser problems with left menu.

--HG--
extra : convert_revision : nicolas.vanhoren%40openerp.com-20110517165327-uhfskt76wtcxsek1


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