Do not throw error when changing perspective over cmd

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33140 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
AngleBisector(3D line, 3D line) command and tool

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33141 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Better compatibility (types)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33142 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Original vectors must be copied

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33143 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e