improving web text editor: localization

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30669 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
calculate the net of a prism or pyramid only if te bottom face is convex

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30670 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e