[IMP] Add statement line reference to search

Add the reference to the search for matching statements. When importing CAMT (Dutch banking files) the description of the invoice is filled in the reference field. The name field only has the index (eg 001), not the full text.

account_statement_completion_label/statement.py

@@ -92,7 +92,7 @@ class AccountStatementCompletionRule(orm.Model):
                          ON
                             st_l.statement_id = s.id
                     WHERE
-                        st_l.name ~* l.label
+                        (st_l.name ~* l.label OR st_l.ref ~* l.label)
                     AND
                         l.profile_id = s.profile_id
                     AND