[giac] removing \_ encoding for desktop, Element[] improvement (unfinished)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25169 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] removing \_ encoding for desktop, Element[] improvement (unfinished)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25170 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] missing brackets in Normal.4

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25171 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e