gh-754: don't make language metadata fall back to the video metadata

Also made it so that if we set metadata for a subtitle version, it
doesn't add it to the video metadata (although it still updates the
metadata types for the video).
Updating integration repo
gh754: Don't default to video metadata in the new editor
Expand/Collapse both metadata sections together.

I've been meaning to fix this one for a while, and wanted to sneak it
in since I was already working with the metadata section.
gh719: fix alignment of rows in the new editor.

We were forcing the text fields to have at least 2 rows in them.  This
was another fix that I wanted to sneak in.
Merge pull request #761 from pculture/gh-754

Gh 754