No access to polyline coordinates via editor #3285

The only way to directly access polyline coordinates at the moment is through the scripting API. To have these positions available in the UI was mentioned before (https://github.com/mapeditor/tiled/issues/1487#issuecomment-514304910), but so far no solution has been implemented.

Through scripting one could do:

> tiled.activeAsset.selectedObjects[0].polygon.map(p => "(" + p.x + ", " + p.y + ")")
$0 = (0, 0),(-82, 87),(76, 152),(109, -9)

For modifications it has to be assigned back:

let object = tiled.activeAsset.selectedObjects[0]
let polygon = object.polygon
polygon[1].x = 30
object.polygon = polygon