Links to jenkins jobs in build/tests report pages

Pages such as https://lhcb-nightlies.web.cern.ch/nightly/lhcb-master/1410/Allen/x86_64_v2-centos7-gcc10-opt/build and https://lhcb-nightlies.web.cern.ch/nightly/lhcb-master/1410/Allen/x86_64_v2-centos7-gcc10-opt/tests don't have a link to jenkins (or at least I don't see it). I think they used to have such a link which is very convenient.