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 element reference which refers to the given referenceable
	 * element.
	 * 
	 * @param referred
	 *            the element whose element references are updated
	 */
	public void updateClientReferences( ReferenceableElement referred )
	{
		List clients = referred.getClientList( );
		Iterator iter = clients.iterator( );
		while ( iter.hasNext( ) )
		{
			BackRef ref = (BackRef) iter.next( );
			DesignElement client = ref.element;
			ElementRefValue value = (ElementRefValue) client.getLocalProperty(
					this, ref.propName );
			value.unresolved( value.getName( ) );
			referred.dropClient( client );
			if ( IStyledElementModel.STYLE_PROP.equalsIgnoreCase( ref.propName ) )
				client.broadcast( new StyleEvent( client ) );
			else
				client.resolveElementReference( this, client
						.getPropertyDefn( ref.propName ) );
		}
	}
	/**
	 * Returns whether this module is read-only.
	 * 
	 * @return true, if this module is read-only. Otherwise, return false.