NPE fix

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35626 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[web] toolbar submenu closing

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35627 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Send default as argument to getDataParam methods

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35628 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e