Interactive Marker in RViz2 throws log messages until a world model element is selected

[matthias-mayr]

SkiROS2 has an interactive marker server that allows to manipulate the pose of a world model element directly in RViz.

When having the marker activated in RViz2 it prints a lot of log messages until a first world model element is selected in the world model.
Possibly this could be resolved in "our" server side. The current situation means that we can not really have RViz configurations that have the marker enabled.