dedicated support for "useful combination" tags

[tyrasd]

some tags are very often used in combination with another tag which is technically optional, but most of the time useful. Sometimes these are documented in the OSM wiki as a "useful combination" in the tag's info box.

An example is for example adding oneway=yes to a drive-through way. Another one could perhaps be building=parking for a parking=multi-storey feature.

I see two possibilities to support these:

• By default add these tags when a user creates a new feature using the preset. This would work similar to the existing addTags mechanism, but shouldn't show a validation/warning of incomplete tags when the tag is not present (e.g. because it was removed by the user or when existing data just doesn't have them). This could perhaps be called initializeTags?
• Somehow highlight the "useful" fields more prominently or guide the user to these fields in some other way. This would also need a way to mark the respective tags in the presets schema as "useful".

[1ec5]

Relatedly, I think the iDv3 branch had some work towards proximity-based presets: openstreetmap/iD#4138 openstreetmap/iD#4139. There was also an idea about visually grouping related fields, which could be driven by a “useful combination” concept: openstreetmap/iD#8104.