when one is adding an inline entity for a relation of a single card,
the 'add a new xxx' link disappears. If the user then cancel the addition,
we have to make this link appears back. This is done by giving add new link
id to removeInlineForm.
"""this contains the cube-specific entities' classes
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""