No hit label for axis

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35611 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
web: calculate real label dimension

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35615 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e