Bug 54737 Libraries dialog doesn't remember status of items in library tree
Preferences > Java > Build Path > User Libraries: The dialog does not seem to correctly remember the status of the items in the "Defined user libraries" tree. When I leave the dialog I close (un-cascade) all items. When I open the dialog again, most of the items are open (cascaded) again. This is disturbing because I cannot overview the items. It's like opening the Windows explorer with not only the drives shown but all folders being open.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/dialogfields/TreeListDialogField.java
}
			return false;
		}		
		
		public void selectionChanged(SelectionChangedEvent event) {
			doListSelected(event);
		}
		
		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.IDoubleClickListener#doubleClick(org.eclipse.jface.viewers.DoubleClickEvent)
		 */
		public void doubleClick(DoubleClickEvent event) {
			doDoubleClick(event);
		}		
	}
	protected void doListSelected(SelectionChangedEvent event) {
		updateButtonState();
		if (fTreeAdapter != null) {
			fTreeAdapter.selectionChanged(this);
		}
	}
	
	protected void doDoubleClick(DoubleClickEvent event) {
		if (fTreeAdapter != null) {
			fTreeAdapter.doubleClicked(this);
		}
	}
	
}