EDIT

ref #6925 Implemente generic CollapseHandler

ref #6909 Add "Collapse" toolbar item to navigator

ref #6990 Evaluate preferences for search results

• open in navigation part stack

ref #6925 Open PK editor in editor area

ref #6595 code refactoring

ref #6595, 6568 Open taxon name editor in editor area

• migrate taxonomic perspective

ref #6925 Export element IDs

• move AppModelId classes

ref #6908 Avoid opening the same PK in multiple editors

ref #6908 Close PK editor when deleting key

ref #6990 catch potential NPE