Fix for Bottom[ cone ]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33019 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
* angle(line, line, orientation)
* fix for angle(line, line)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33023 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e