add vertical and horizonthal separation lines to the gui builder


git-svn-id: http://root.cern.ch/svn/root/trunk@10129 27541ba8-7e3a-0410-8455-c3a389f83636

New version of the guibuilder with its new user interface


git-svn-id: http://root.cern.ch/svn/root/trunk@10105 27541ba8-7e3a-0410-8455-c3a389f83636