Going on the DM view of a social workspace : Collaboration tab is still selected and navigation tree incomplete

Steps to reproduce:

1. Go on the dashboard of a social workspace.
2. Click on Actions > Document Management View.
   -> The DM view of the social workspace is displayed. OK
   -> The Document management tab is not selected, it's still the Collaboration tab.
   -> The navigation tree on the left is incomplete : it only displays the social workspaces, not the other parts (domain for instance).