1) set_active was being called twice 2) control surface objects were deleted in drop_session, but not recreated in set_session git-svn-id: svn://localhost/ardour2/trunk@1467 d708f5d6-7413-0410-9779-e7cbd77b26cf
git-svn-id: svn://localhost/ardour2/trunk@1460 d708f5d6-7413-0410-9779-e7cbd77b26cf