disable maxspeed quest for unpaved roads

[matkoniecz]

https://github.com/westnordost/StreetComplete/blob/master/app/src/main/java/de/westnordost/streetcomplete/quests/max_speed/AddMaxSpeed.java - currently it will generate quests in places where legal limit is irrelevant

It is useful mostly in countries with poor infrastructure, but also in Europe some landuse=residential may be unpaved.

[westnordost]

Yes, makes sense.

[westnordost]

also moved down in priority slightly, so the user specifies road surface before maxspeed.

[matkoniecz]

so the user specifies road surface before maxspeed

Without fixing #746 it will not work as expected - user after entering unpaved will be anyway asked about maxspeed.

[westnordost]

Right. Too bad :-/

[westnordost]

But now, #746 could be implemented actually for "simple" quests.

[westnordost]

Since 15d1e90