in offline mode, ask all tasks on a building

[Strubbl]

Use case
I am using StreetComplete offline without any connectivity. When mapping the type of the building, StreetComplete does not ask for the roof shape of that building and not for the building levels.
After mapping i upload the results at home. Afterwards i see the next type of quest, either roof shape of building levels. This way i have to do a second or even third survey to complete all open tasks for one building.

Proposed Solution
Ask all question w.r.t. to the building: type, roof shape and building/roof levels.

[matkoniecz]

See discussion in #1550 and #1510

Fixing this is likely to be very time consuming and/or complex and/or reduce perfomance of StreetComplete - unfortunately it is not a quick fix requiring just hour or two.

[Strubbl]

Thanks for the pointer. It's a pity there is no simple solution for this serious problem. My device is wifi only. that is why this problem is more severe when mapping with that device.