test whether relation member ways are properly ordered

[aceman]

In the WronglyOrderedWays test, it could warn when the members of a relation are not properly ordered. That means, they are not producing a continuous line (or circle) in the display of the relation. While the members may be continuous if summed together, the relation editor may display them as segments with holes. Reordering the members would make the relation editor show the nice "closed way circle". I'd like to find such relations and reorder the members so that it is also visually clear they form a closed way.

This would only apply to relations where JOSM understands the member roles and where the ways are intended to produce a continuous joined way. E.g.:
type='route' - the ways should form a continuous line (unclosed), unless "forward", "backward" roles are used
type='multipolygon', 'boundary' - the sets of "outer" and "inner" members should form a closed ways each. I think JOSM already warns if these are unclosed, but I'd like to check the order of the members on top of that.

[skyper]

Ticket #13235 has been marked as a duplicate of this ticket.