- Copy operation are not dirtying the model any more: Add a write flag to annotation actions; Only those will are dirtying a model now.
- Context menu in the annotation view is no longer visible for non-editable annotations.
- References and multi-references are now correctly handled:
  - Correct the set logic.
  - Offer two kinds of pastes for multi-reference annotations: append, replace.
- Fix duplicated context menu entries for the SafetyIntegrityLevel annotation (details: see bug report).
refs 2361