This major update changes the behaviour of the docviewer module to use a cached manifest rather than on demand. This allows us to simplify the URL matching and store 'nice' URL configuration rather than altering handleAction().
The advanced searchbox only really functions properly for multiple
entities if they all have similar versions. If not, it will let you
search on entity-version combinations that might not even exist, which
can get confusing..
In such cases optionally disabling it could be a solution, waiting for
a better solution (possibly
