This reverts commit f1cd21a5.

Fixed issue when a filter is required and no default value is set and you want to set the default value.

Fix Activity Contact field usage in filters

See merge request !68

Added aggregation for activity data source so you can aggregate on the most recent, the least recent activity.

Fixed issue with Field Filter on relationship type and also made relationship type a non required filter on the data source.

Contact Search Output is now also able to create smart groups and send bulk mails (with a hidden smarty group). See #32.

Added aggregation for membership data source so you can aggregate on the most recent, the least recent memberships.

Added aggregation for membership data source so you can aggregate on the most recent, the least recent memberships.