Fit line with 3D point (in xOy plane)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34757 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#4379 preview for Parabola Tool

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34758 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e