Feature: add waystone waypoints to a specific waypoint set.

[endigma]

In Xaero's Minimap waypoints, "Waypoint Sets" are available.

It would be very convenient to be able to specify (by name string) a set to always use for waystone waypoints, and have this set automatically created and populated with activated waystones.

This should be an option in whatever API you are using to create the waypoints, probably a field there.

For reference it's available in all editing waypoint screens.

Current functionality is waypoints are added to active set, which I suppose could be left as a "legacy mode" for people who want this functionality to stay.