Title: #5507: [Backport][ipa-4-9] Only build the UI with uglifyjs on RHEL 8
This PR was opened automatically because PR #5493 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/5507/head:pr5507
git checkout pr5507