[FIX] value-content tests on set_value for some widgets
[FIX] value-content tests on set_value for some widgets

note: NaN != NaN, need to use isNaN

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