Bug 99732 [build path] Exclusion filters are added on new source folder when unnecessary
In RC2. If you add a source folder inside another source folder, the outer folder's exclusion filters are updated to avoid ambiguity. Now, remove the inner folder from the class path, and re-add it. Every time this is done, the inner folder is added to the outer folder's exclusion filter, ad infinitum.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceContainerWorkbookPage.java
return EMPTY_ARR;
		}
		public Object getParent(TreeListDialogField field, Object element) {
			if (element instanceof CPListElementAttribute) {
				return ((CPListElementAttribute) element).getParent();
			}
			return null;
		}
		public boolean hasChildren(TreeListDialogField field, Object element) {
			return (element instanceof CPListElement);
		}		
		
		
		public void dialogFieldChanged(DialogField field) {
			sourcePageDialogFieldChanged(field);
		}
	}
	
	protected void sourcePageKeyPressed(TreeListDialogField field, KeyEvent event) {
		if (field == fFoldersList) {
			if (event.character == SWT.DEL && event.stateMask == 0) {
				List selection= field.getSelectedElements();
				if (canRemove(selection)) {
					removeEntry();
				}
			}
		}	
	}	
	
	protected void sourcePageDoubleClicked(TreeListDialogField field) {