From Bertrand:

- Hide GUI parts that are not used (yet) in local session
- Fix bug report: http://savannah.cern.ch/bugs/?16886
- Fix bug report: http://savannah.cern.ch/bugs/?16885


git-svn-id: http://root.cern.ch/svn/root/trunk@16399 27541ba8-7e3a-0410-8455-c3a389f83636