Update of /cvsroot/inkscape/inkscape/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv1352
fix: Don't call setCurrentLayer(NULL) for click in empty space when we're already at root.
Allow going up a level if the parent is a non-root <svg> element.
Allow going to the root level if we're not currently in a layer.
Document choice of criteria for allowing ascending a level on click in empty space.