App: Navigation advanced route appearance

[devemux86]

@rumbrummer

As far as I can see that is just the way Garmin Navis work (my Zumo 660 and my Navigator 5 do).
Usually the active leg has a magenta color, inactive legs have a pale magenta color (you can change that by modifying theme files).

@leeeb

With my IGO Navi it was like this:
The current section of the tour, to the next waypoint, was in a different color than the rest of the tour.