fixes #4956 - content view errata by id filter - list available errata

This is a fix so that available errata are listed in
the UI.  This is fixing a regression that I introduced with
17f9b25871460e59cee62bd54484806398d2b330 :(
Merge pull request #3919 from bbuckingham/issue-4956

fixes #4956 - content view errata by id filter - list available errata