MH-8100 fixed getting current segment (time)

git-svn-id: https://opencast.jira.com/svn/MH/branches/MH-8100@14801 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-8100 Format the displayed time for the duration after trimming

git-svn-id: https://opencast.jira.com/svn/MH/branches/MH-8100@14802 e6edf6fb-f266-4316-afb4-e53d95876a76