// Remove unitmarker of given unit and put it back in the pool
private void RemoveUnitWaypointMarker(UnitWaypoint unitWaypoint)
{
UnitWaypointMarker unitMarker = unitWaypointMarkers[unitWaypoint];
unitMarker.Deactivate();
unitWaypointMarkers.Remove(unitWaypoint);
unitWaypoints.Remove(unitWaypoint);
unitWaypointMarkerPool.Add(unitMarker);
}