\scalebox: basic support by ignoring first operand (note that the first operand should still be syntactically correct to work)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31597 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fixed NPE: cancel button works again on Text tool's dialog. (#4011)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31599 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e