Bug 122850 Table/list should not be able to be inserted in Master Page mode.
Description: Table/list should not be able to be inserted in Master Page mode. Steps to reproduce: 1. New a report and transfer to Master Page mode. 2. New a datasource and dataset 3. Drag a list/table to page header/footer, bind it to dataset and drag some columns inside. 4. Save and preview Expected result: Insert list/table item in master page should be forbidden. Actual result: They are allowed and preview showed "undefine" in page
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
* Updates the style reference using the element in the given library list.
	 * 
	 * @param librariesToUpdate
	 *            library list
	 */
	public void updateReferenceableClients( List librariesToUpdate )
	{
		int size = librariesToUpdate.size( );
		for ( int i = 0; i < size; i++ )
		{
			updateReferenceableClients( (Library) libraries.get( i ) );
		}
	}
	/**
	 * Updates the theme/style element reference which refers to the given
	 * library.
	 * 
	 * @param library
	 *            the library whose element references are updated.
	 */
	public void updateReferenceableClients( Library library )
	{
		updateReferenceableClients( library, ILibraryModel.THEMES_SLOT );
		
		List images = library.getListProperty( library, Module.IMAGES_PROP );
		if ( images == null || images.isEmpty( ) )
			return;
		boolean sendEvent = false;
		for ( int i = 0; i < images.size( ); i++ )
		{