remove `menuitem`s as they are not part of the HTML living standard: - [x] menuitem type=command - [x] menuitem type=checkbox - [x] menuitem type=radio `menu` *is* part of the HTML living standard, so this should stay in AAM, but it does not accept a `type` attribute. - [x] revise menu to remove reference to type
remove
menuitems as they are not part of the HTML living standard:menuis part of the HTML living standard, so this should stay in AAM, but it does not accept atypeattribute.