Remove debug.
Set label visible.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31302 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
unset label names for net points
fix angle computation for rotate

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31303 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e