Fix 'Umbrello crashes after undoing class attribute deletion'.
UMLClassifierListItem objects were not be added to the parent on undo. Also keep handling of UMLAttribute instances in sync with UMLOperation and UMLTemplate which are only removed from the parent classifier and not deleted. BUG:372601 FIXED-IN:2.20.80 (KDE Applications 16.11.80)
Showing with 12 additions and 9 deletions