agenda/models: add fifth week of the month option to the PERIODICITIES list
Also fix recurrent event created since change of week-rank 4 semantic(fifth-week instead of last week).
fixes #4584
agenda/models: add fifth week of the month option to the PERIODICITIES list
Also fix recurrent event created since change of week-rank 4 semantic
(fifth-week instead of last week).
fixes #4584