If the user change the language (and the direction), the close-message dialog appears only if the saving into local storage was unsuccessful (#2922)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23313 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removed debugging, cleaned code; CAS Tools seem to show up now

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23314 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Web CAS: avoid stack overflow

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23315 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e