selection field required

[Raimon Esteve (www.zikzakmedia.com)]

Don't red alert field is required and if selection

Example:

 'company':fields.selection([
                                    ('yes','Yes'),
                                    ('no','No')
                                    ],'Company Mail A/c', readonly=True, help="Select if this mail account does not belong to specific user but the organisation as a whole. eg:<email address hidden>",required=True, states={'draft':[('readonly',False)]}),

Tested in powermail module