Make the Mass Product Changer form the more friendly usability

It would be more convenient if the fields list of Mass Product Changer has colored sections: i.e. the fields, which are already filled in the selected products be in one color, the fields, that can be selected from the drop-down variants - in the other one and the fields, which are not filled (empty) - the third one . This could be improve the visual perception of Mass Changer form and avoid the omissions of the data needed to update.