default to showing the clusters in the fabric (though let folks navigate elsewhere)
show URLs which appear to be URLs as real links by default
partial fix for #263 as sometimes we now have children nodes inside an MBean (e.g. for camel routes which have child nodes) so lets only take the first node if its an mbean
partial fix for #263 so that if a list of attribute names are passed in with the 'att' search argument on the URL and they don't match any attributes on this mbean (e.g. if they are from a different mbean) then ignore them and just use all the numeric attributes until folks click the "Edit Chart" button