Start 3D view settings and use only it in MyXMLHandler3D

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35934 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Remove views for plane from dock panels list when load a file (fix for open a file after some file with already views for plane)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35935 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e