MH-8100 wave form display bug fix #3

git-svn-id: http://opencast.jira.com/svn/MH/branches/MH-8100@13699 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-8100 Bigger trim editor, added horizontal scrollbar if window is too small

git-svn-id: http://opencast.jira.com/svn/MH/branches/MH-8100@13700 e6edf6fb-f266-4316-afb4-e53d95876a76