Fix that the player would pause when selecting the active book from the bookshelf

We're fixing this with an ugly fix, that appends a "from" parameter to
the url, when redirecting to the book player from the bookshelf. But it
works...

This method might solve the other URL related problems we've had, until the transition to a better application structure. Fixes [NOTA-230](https://notalib.atlassian.net/browse/NOTA-230)