[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
add_relation_type('prefered_form')
rql('SET X prefered_form Y WHERE Y canonical TRUE, X identical_to Y')
checkpoint()
drop_attribute('EmailAddress', 'canonical')
drop_relation_definition('EmailAddress', 'identical_to', 'EmailAddress')
if 'see_also' in schema:
sync_schema_props_perms('see_also', syncprops=False, syncrdefs=False)