Ticket #3731: cells are made visible now, but their width is still not OK

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29440 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3731: in theory, this should work, in practice, this does not (table colgroup widths are 35px, 5px, 5px, etc; visually they are all looking like x times wider, respectively)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29441 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e