[web/component] guard against invalid page_size form parameter
Same as dff28956f37e, except the almost same code exists in two places
(yay us).
for table, column in [
('transactions', 'tx_time'),
('tx_entity_actions', 'tx_uuid'),
('tx_relation_actions', 'tx_uuid')]:
repo.system_source.create_index(session, table, column)
commit()