Fix for slides as it's dependent on media.

@kprovance, can you make sure the build is respecting that dependency so we're not shipping slides without the media field? Thanks.

Pushed this on both master and here.
Update field_group.php

Added 'redux-js' as a dependency for the group field, because of redux variable.
Merge pull request #1343 from tpaksu/patch-2

Update field_group.php