Fixes an error that occurs when moving the document by setting another link ID or Scope path. This is due to the fact that author is a required property in the Work model. Patch by: Lennard de Rijk

Fixed some access related bugs These were not obvious previously, but with the sidebar not showing up when one does not have access, they stood out.

Make the sidebar dynamic depending on the user's rights This is done by doing the usual access checks that are also called when the user actually visits the page.