[Route list] "Next" and "Previous" buttons to jump to the next/previous section in a (super)route

[pelderson]

I would very much appreciate "Next" and "Previous" buttons to jump to the next/previous section in a (super)route.

I noticed I often need to go to the next or previous section (daily stage) of a (super)route. Regular end users will probably not use this as much as I do for maintenance of the routes in OSM, but when planning a long trip you often go to the next/previous secion.

The functions should replace the click sequence of

• Click the Part-Of header
• Click the superroute
• Click the Sections header
• Find/scroll to the next/previous section
• Click the next/previous section

'Next' and 'previous' refer to the order of the members in the superroute relation.
The mappers are responsible that the order in the relation is correct.
If a route is a part of multiple superroutes, the functions are simply not available.

(An "Up" button also comes to mind, but that would only save one click.)

[lonvia]

I'll put that up for a contribution. Next/Back under each superroute entry should be fine.