oaeproject/3akai-ux — pull request #3442 by simong (2014-01-26 11:49:31+00:00)
Title: Get new signature for content previews when adding new previews when the old one is expired

If you keep the page open for a long time (ex: reading a set of slides) the signature will expire and new pages won't be loaded.

The signature object contains an `expires` field that can be checked whether or not the signature has expired. If it has, we will need to refetch the content profile to get a signature.