ProjectDemo: Outliner: include item labels in most of the commit descriptors

git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@10609 7b3f36aa-e6db-49c1-8b4c-66eac1997e64
ProjectDemo: hook up 'history' toolbar buttons

git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@10610 7b3f36aa-e6db-49c1-8b4c-66eac1997e64