Reduce logging level to a minimum

[sercero]

Hello @paroj, when testing some things, the logging level of OGRE becomes very annoying.

I haven't been able to tone it down using the setMinLogLevel(). No matter what level I chose it does not change anything.

Perhaps this is controlled by OgreBites?

[paroj]

OGRE_MIN_LOGLEVEL=3 python3 ogre_mesh_viewer.py

you probably changed the log level too late, so the rendersystem stuff already went through