Fallback area preset loses its area=yes tag

[bhousel]

Seems like the area=yes tag is getting removed from the fallback "Area" preset - this turns it back into a normal line. Not sure when this regressed, but we should fix it.

[willemarcel]

@bhousel why does this preset is available to an area feature? I think it should be available to lines, as sometimes we need to apply area=yes tag to a feature that was drawn as line.

[bhousel]

@bhousel why does this preset is available to an area feature? I think it should be available to lines, as sometimes we need to apply area=yes tag to a feature that was drawn as line.

Yes, we should have a way to switch between area <-> line.

I tried adding it here, but decided not to merge until we can limit it to closed features: #1828 (comment)

[bhousel]

This broke in 9882cf1, fixing #4114.

It looks like the new code is correct (removing area=yes and adding it back only if needed per areaKeys lookup) - in all cases except for the case where the preset is trying to set the area tag to something. 😅