The picker in the includeLibrary macro should propose only pages from the libraries configured in the book

After the implementation of the picker, the includeLibrary macro doesn't work anymore.

Reopened to fix the fact that after the implementation of the picker, the includeLibrary macro doesn't work anymore.

This seems to be related to the way the reference parameter is converted to a page reference, here: https://github.com/xwiki-contrib/book-versions/blob/master/application-book-versions-default/src/main/java/org/xwiki/contrib/bookversions/internal/displayers/LibraryReferenceConverter.java#L51 - the resolver used is a default resolver which resolves the value in the context of the main wiki. I think there are 2 possible solutions:

• either we manage to convert it to the correct value
• either we convert it to a relative reference, and leave it to the code of the macro to figure it out.

I think we should strive for the first solution.