[repo] fix bug introduced by 4757:ec9c20c6b9f7, testing for select.selection is not enough to avoid the substep query, we should check there is no interesting restriction (test added)

"""pre 3.6 bw compat"""
# pylint: disable-msg=W0614,W0401
from warnings import warn
warn('moved to cubicweb.tags', DeprecationWarning, stacklevel=2)
from cubicweb.tags import *