properties files and related resources automatically updated from ggbtrans

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34376 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
implemented hide/show headers in web spreadsheet (#3706):


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34377 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e