When syncing media on close, the collection may be closed before
media syncing completes.
A better solution in the future will be decouple translations from
the collection object.
We can now show replay buttons for the audio contained in {{FrontSide}}
without having to play it again when the answer is shown.
The template code now always defers FrontSide rendering, as it wasn't
a big saving, and meant the logic had to be implemented twice.
