Fix for MH-5262.

git-svn-id: https://opencast.jira.com/svn/MH/trunk@14958 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9790 -- Fixed mediapackage UI initialization

git-svn-id: https://opencast.jira.com/svn/MH/trunk@15000 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9790 -- Fixed mediapackage editor non-dublincore catalog deletion

git-svn-id: https://opencast.jira.com/svn/MH/trunk@15012 e6edf6fb-f266-4316-afb4-e53d95876a76