<Tab> doesn't navigate from an item to an another item in toolbar.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32950 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.254.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32951 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e