3D axes: unit labels

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34591 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Don't destroy input bar on File > New

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34592 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e