Add support for overpass generated relations

[CollinBeczak]

Issue: whenever a user would try to build a task with a relation object ( Example: (relation(797867);); out geom; ), the task would be dropped because nothing was in place to generate the geometries for a relation. This pr adds support for the geojson generated from the backend change to be used in the rapid editor, and also fixes some of the marker popup related issues, but there are some bigger issues related to marker popups that will be addressed in another ticket.