Suggestion: Refined style during routing

[Framstag]

I enjoyed seen al these details on the map during driving while been routed (while still be fast in rendering). However I have the feeling the stylesheet should show reduced information (only show details helpful to orientate like visible points or overlays like suburb names, likely one needs some iterations for this).

In principle this should be easy using the existing conditional feature for stylesheets, which allows use the drop styles in case of a "currentlyRouting" flag (or similar).

[janbar]

I am not a specialist of the map style-sheet. Need to learn and test about "flags" ...