Title: #5859: [Backport][ipa-4-9] WebUI: Fix certificate serial number representation
This PR was opened automatically because PR #5844 was pushed to master and backport to
ipa-4-9 is required.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/5859/head:pr5859
git checkout pr5859