map pins/label ordering, etc.

[prokrypt]

Ideally the most recent waypoints/nodes should appear on top of others. Also, it would be more convenient to select/edit by tapping the label instead of hunting for the point under the pin. Maybe have consecutive taps select the next pin under the tapped location? Maybe bring up the edit box when the pop-up balloon is tapped? ¯\_(ツ)_/¯ It would be great if we are able add a waypoint at our current location (currently long-pressing our own node pin does nothing).