Make lower sum visible in EV

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36136 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
3D path (e.g. 3D conic) can pointChanged() a 2D point

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36137 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e