MH-7526 aspect ratio width/height now changing as well when custom fields are changed by the user

git-svn-id: https://opencast.jira.com/svn/MH/trunk@13646 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9369 -- show alert if submit fails

git-svn-id: https://opencast.jira.com/svn/MH/trunk@13647 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9121 correctly seeking when editing the time in a media with two tracks

git-svn-id: https://opencast.jira.com/svn/MH/trunk@13648 e6edf6fb-f266-4316-afb4-e53d95876a76
MH-9146 controls not above the video when controls are not hidden

git-svn-id: https://opencast.jira.com/svn/MH/trunk@13649 e6edf6fb-f266-4316-afb4-e53d95876a76