[web] remove data-param-filename

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26141 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] Improved numerical check in solve using multi-precision floats

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26145 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e