Internet Explorer bug fix ColorBar

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27110 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
web fix

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27111 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e