[web] on logout, use the base_url argument of build_url instead of hacking the request to get proper url. This fix a bug on site with http/https versions: the session cookie is badly removed on logout
# type attribute might already be there if migrating from
# version < 3.5 to version >= 3.5.3, BaseTransition being added
# in bootstrap_migration
if versions_map['cubicweb'][0] >= (3, 5, 0):
add_attribute('BaseTransition', 'type')
sync_schema_props_perms('state_of')
sync_schema_props_perms('transition_of')