Fix search execution
Collection task: Start with simple search and move to extended search; performance particulary important
(from redmine: issue id 67, created on 2018-01-22tgradl, closed on 2018-01-22)
Collection task: Start with simple search and move to extended search; performance particulary important
(from redmine: issue id 67, created on 2018-01-22tgradl, closed on 2018-01-22)