def: 6569 replace "kaltura editor" with "unknown" text

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/front/workspaces/kmc/trunk@92772 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
fwr: v numver 5.30

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/front/workspaces/kmc/trunk@92773 6b8eccd3-e8c5-4e7d-8186-e12b5326b719
fwr: v5.30 files

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/front/workspaces/kmc/trunk@92784 6b8eccd3-e8c5-4e7d-8186-e12b5326b719