Expand OverPass Query Highlighter to ways (street, building)

[tordans]

ATM, only nodes are highlighted. The feature is also interesting for areas and lines.

Example:

• highway=* and surface is null for all streets that are missing a surface
• building=* and "roof:shape" is null for all buildings that are missing roof-tagging

[wtimme]

Thanks for the suggestion, @tordans!

This proved easier than expected, since the parser is type-agnostic and works with ways/buildings the same it works with objects.

Here's a preview:

I've also submitted a new TestFlight build that includes these changes. Please have a look and let me know how it works.

One thing that I noticed while testing is that we need to be able to have multiple quests/queries active at the same time (cp. #21). Switching back and forth between them gets tedious after some time.

[tordans]

A quick test worked great. Thanks!