[dataimport] add missing import 'eschema_eid'
grafted from e3ec46b5c710067a0cecca53cc593a0dd4bd927e (3.22)
related to #9177565
import ConfigParser
try:
undo_actions = config.cfgfile_parser.get('MAIN', 'undo-support', False)
except ConfigParser.NoOptionError:
pass # this conf. file was probably already migrated
else:
config.global_set_option('undo-enabled', bool(undo_actions))