Bug 142432 MasterPage from library can't be restored to modify
Details: MasterPage from library can't be restored to modify Step: 1.New a library named lib1, and insert a masterpage named lib-mp. 2.Publish the library into resource folder. 3.New a report design and use lib1. 4.Drop the lib-mp from library explorer into outline of report design. 5.Double click lib-mp, and switch to Property editro tab. 6.Click restore. Actual result: Pop up an error message and said that the master page cannot specify size the page type is not custom.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SimpleGroupElementHandle.java
{
	/**
	 * The module that provides overall information, especially the command
	 * stack.
	 */
	protected final Module module;
	/**
	 * List of handles to design elements.
	 */
	protected List elements = null;
	/**
	 * Constructs a handle to deal with a list of report elements. The contents
	 * of the given list should be design element handles.
	 * 
	 * @param moduleHandle
	 *            the handle of module
	 * @param elements