Intersection of segments are supported now


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35989 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for EV zoom when no file opened

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35990 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e