[treeview] ensure items are ordered according to their dc_title, we can't rely on an ordered rset * is_last has to be computed on the caller now, not possible in the callee * rely on b3f61c38526b to use entity.view() with vid in *view*'s arguments

from os.path import join
from cubicweb.toolsutils import create_dir

option_renamed('pyro-application-id', 'pyro-instance-id')

create_dir(join(config.appdatahome, 'backup'))