* fix first update of degenerate pyramid/prism
* draw bottom of cylinder/cone if label is not set
* SetViewDirection[ Direction ] command (in script 3D table)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26076 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e