improve deduplication handling and saving in bulkeditor
cleanup
fix #6392: fix remaining bulk editor migration issues
ref #7136: reload objects after deduplication
ref #6932 Do not reset merge candidates when saving before merge
fix #7000 Enable details view editing for bulke editor
ref #6932 Migrate merge handlers
ref #6932 Refactor merge and delete handler
ref #6932 Refactor merge annotating
ref #6932 Migrate bulk editor handlers and add annotation merge support
ref #6932 Migrate bulk editor handlers (part I)
ref #6932 Migrate bulk context menu (non-functional)