#20 GroupParticipations dissapear when joindate is empty

[André Offringa]

When you add a member to a group, and you empty the joindate and put the leavedate to a date in the future, the participation is not visible in any of the lists where it should (current participations, previous participations).

[Nobody/Anonymous]

Probably related is: when you add a participation with a join date of 'today' and a leave date in the future the participation will also 'disappear' It will not show in any of the lists.