Streetcomplete: Selected quest pin should always be on top

[westnordost]

The selected quest pin should always be on top of other quest pins. Now that quest pins have a selection frame, it looks odd to only see the selection frame but not the pin.

[westnordost]

I added another tangram layer that only shows the selected pins and put it in a blend order higher than the normal pins. So technically, the selected pins are shown twice. Once normally, and once on top of itself, when selected.

[westnordost]

If it was ever possible to efficiently change properties of single features displayed on a map layer, an easier solution could be done.