Title: #908: WebUI: Actions array in search facet spec does not have 'undefined'
In case that there are no actions specified in spec object, the concatenation
of arrays causes that 'undefined' item is added into the array.
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/908/head:pr908
git checkout pr908