Media: Use the proper translated string for Video Playlist "drag info".

Merges [28178] to the 3.9 branch.

props wonderboymusic.
fixes #27937.

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git-svn-id: http://core.svn.wordpress.org/branches/3.9@28057 1a063a9b-81f0-0310-95a4-ce76da25c4cd