Bug 54595 Load User Libraries dialog has layout problems
Reached through Pref Page Java/Build Path/User Libraries/Load...
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/UserLibraryPreferencePage.java
CPUserLibraryElement element= getSingleSelectedLibrary(list);
			editArchiveElement(null, element);
		}
	}
	
	private void doLoad() {
		LoadSaveDialog dialog= new LoadSaveDialog(getShell(), null, fDialogSettings);
		if (dialog.open() == Window.OK) {
			List existing= fLibraryList.getElements();
			HashMap map= new HashMap(existing.size());
			for (int k= 0; k < existing.size(); k++) {
				CPUserLibraryElement elem= (CPUserLibraryElement) existing.get(k);
				map.put(elem.getName(), elem);
			}
			
			List list= dialog.getLoadedLibraries();
			for (int i= 0; i < list.size(); i++) {
				CPUserLibraryElement elem= (CPUserLibraryElement) list.get(i);
				CPUserLibraryElement found= (CPUserLibraryElement) map.get(elem.getName());
				if (found == null) {
					existing.add(elem);
					map.put(elem.getName(), elem);
				} else {
					existing.set(existing.indexOf(found), elem); 
				}
			}
			fLibraryList.setElements(existing);
			fLibraryList.selectElements(new StructuredSelection(list));
		}
	}