relation editor: highlight "doubled" members with different roles differently than "doubled" members with the same role

[skyper]

Please highlight "doubled" members with different roles differently than "doubled" members with the same role in the relation editor.

Right now I do not see any differences between the same members with different roles and same members with same roles. I have a route, line=bus which uses the same way first forward and later backwards. I can order its members using the way twice with different roles, someone else will not see the differences and just delete one of the entries in member-list, cause they are highlighted as "doubled".

Thanks skyper